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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

LH2O
The heat (Btu) needed to vapourise and superheat one pound of water. ... (05 Dec 1998) ...

Lhermitte, Jean
<person> French neurologist, 1877-1959. ... See: Lhermitte's sign. ... (05 Mar 2000) ...

Lhermitte's sign
<clinical sign> Sudden electric-like shocks extending down the spine on flexing the head. ... (05 Mar 2000) ...

lhrh agonists
Compounds that are similar to LHRH (luteinizing hormone-releasing hormone). ... (12 Dec 1998) ...

Li
Symbol for lithium. ... (05 Mar 2000) ...

Li-Fraumeni cancer syndrome
<syndrome> Familial breast cancer in young women, with soft-tissue sarcomas in children and other cancers in close relatives. ... (05 Mar 2000) ...

Li-Fraumeni syndrome
<syndrome> An inherited family trait carrying an increased risk of cancer during childhood and early adulthood. ... (13 Nov 1997) ...

Li, Frederick
<person> 20th century epidemiologist. ... See: Li-Fraumeni cancer syndrome. ... (05 Mar 2000) ...

liability, legal
Accountability and responsibility to another, enforceable by civil or criminal sanctions. ... (12 Dec 1998) ...

liable
1. Bound or obliged in law or equity; responsible; answerable; as, the surety is liable for the debt of his principal. ... 2. Exposed to a certain contingency or casualty, more or less probable; with to and an infinitive or noun; as, liable to slip; liable to accident. ... Synonym: Accountable, responsible, answerable, bound, subject, obnoxious, expo …

liane
<botany> A climbing or twining plant (usually refers to woody climbers). ... (14 Oct 1997) ...

lias
<geology> The lowest of the three divisions of the Jurassic period; a name given in England and Europe to a series of marine limestones underlying the Oolite. ... Origin: Cf. F. Lias, fr. Liais sort of limestone, OF. Also liois; perh. Of Celtic origin, cf. Armor. Liach, leach, a stone, Gael. Leac, W. Llech. Cf. Cromlech. ... Source: Websters Di …

libel
1. A brief writing of any kind, especially. A declaration, bill, certificate, request, supplication, etc. 'A libel of forsaking [divorcement]' (Wyclif (Matt. V. 31)) ... 2. Any defamatory writing; a lampoon; a satire. ... 3. A malicious publication expressed either in print or in writing, or by pictures, effigies, or other signs, tending to expose an …

liberal
1. Free by birth; hence, befitting a freeman or gentleman; refined; noble; independent; free; not servile or mean; as, a liberal ancestry; a liberal spirit; liberal arts or studies. ' Liberal education.' . ' A liberal tongue.' ... 2. Bestowing in a large and noble way, as a freeman; generous; bounteous; open-handed; as, a liberal giver. ' Liberal of …

Liberase
<enzyme> Purified enzyme blend of collagenase isoforms I and II from clostridium histoliticum and thermolysin from bacillus thermoproteolyticus; used for isolation of islets of langerhans from pancreas ... Registry number: EC 3.4.24.- ... (26 Jun 1999) ...

liberator
An agent that stimulates or activates a physiological chemical or an enzymatic action. ... (05 Mar 2000) ...

liberia
A republic in western africa, south of guinea and east of cote d'ivoire. Its capital is monrovia, named for the u.s. President james monroe. Liberia was projected as a settlement of freed american slaves by the american colonization society in 1817 and hence named from the latin liber, free. In 1847 it was established as the free and independent re …

liberins
Synonym: releasing factors. ... Origin: L. Libero, to free, + -in ... (05 Mar 2000) ...

liberomotor
Relating to voluntary movements. ... Origin: L. Liber, free, + motor, mover ... (05 Mar 2000) ...

liberty
Origin: OE. Liberte, F. Liberte, fr. L. Libertas, fr. Liber free. See Liberal. ... 1. The state of a free person; exemption from subjection to the will of another claiming ownership of the person or services; freedom; opposed to slavery, serfdom, bondage, or subjection. 'But ye . . . Caused every man his servant, and every man his handmaid whom he h …

libidinization
Synonym for erotization ... The act of sexual arousal or the state of being sexually excited. ... Synonym: libidinization. ... (05 Mar 2000) ...

libidinous
Lascivious; invested with or arousing sexual desire or energy. ... Origin: L. Libidinosus, fr. Libido (libidin-), pleasure, desire ... (05 Mar 2000) ...

libido
Sexual desire. ... (18 Nov 1997) ...

libido theory
Freud's theory that humans psychic life results mainly from instinctual or libidinal needs and the attempts to satisfy them. ... (05 Mar 2000) ...

Libman
Emanuel, U.S. Physician, 1872-1946. ... See: Libman-Sacks endocarditis, Libman-Sacks syndrome. ... (05 Mar 2000) ...

Libman-Sacks endocarditis
Verrucous endocarditis sometimes associated with disseminated lupus erythematosus. ... Synonym: atypical verrucous endocarditis, Libman-Sacks syndrome, nonbacterial verrucous endocarditis. ... (05 Mar 2000) ...

Libman-Sacks syndrome
Synonym for Libman-Sacks endocarditis ... Verrucous endocarditis sometimes associated with disseminated lupus erythematosus. ... Synonym: atypical verrucous endocarditis, Libman-Sacks syndrome, nonbacterial verrucous endocarditis. ... (05 Mar 2000) ...

Liborius
Paul, 19th century Russian bacteriologist. ... See: Liborius' method. ... (05 Mar 2000) ...

Liborius' method
A method for culturing anaerobic bacteria; a stab culture is made in the appropriate agar medium, then more of the same medium is liquefied and poured into the test tube on top of the stab culture, effectually sealing it from the air. ... (05 Mar 2000) ...

librarians
Specialists in the management of a library or the services rendered by a library, bringing professional skills to administration, organization of material and personnel, interpretation of bibliothecal rules, the development and maintenance of the library's collection, and the provision of information services. ... (12 Dec 1998) ...

libraries
Collections of organised information for study and reference. ... (12 Dec 1998) ...

libraries, hospital
Information centres primarily serving the needs of hospital medical staff and sometimes also providing patient education and other services. ... (12 Dec 1998) ...

library
Synonym for genomic library ... <molecular biology> A collection of DNA molecules, derived from restriction fragments that have been cloned in vectors, that includes all or part of the genetic material of an organism. ... (18 Nov 1997) ...

library administration
Planning, organizing, staffing, direction, and control of libraries. ... (12 Dec 1998) ...

library automation
The use of automatic machines or processing devices in libraries. The automation may be applied to library administrative activities, office procedures, and delivery of library services to users. ... (12 Dec 1998) ...

library collection development
Development of a library collection, including the determination and coordination of selection policy, assessment of needs of users and potential users, collection use studies, collection evaluation, identification of collection needs, selection of materials, planning for resource sharing, collection maintenance and weeding, and budgeting. ... (12 D …

library materials
Print and non-print materials collected, processed, and stored by libraries. They comprise books, periodicals, pamphlets, reports, microforms, maps, manuscripts, motion pictures, and all other forms of audiovisual records. (harrod, the librarians' glossary, 4th ed, p497) ... (12 Dec 1998) ...

library schools
Educational institutions for individuals specializing in the field of library science or information. ... (12 Dec 1998) ...

library science
Study of the principles and practices of library administration and services. ... (12 Dec 1998) ...

library services
Services offered to the library user. They include reference and circulation. ... (12 Dec 1998) ...

library surveys
Collection and analysis of data pertaining to operations of a particular library, library system, or group of independent libraries, with recommendations for improvement and/or ordered plans for further development. ... (12 Dec 1998) ...

library technical services
Acquisition, organization, and preparation of library materials for use, including selection, weeding, cataloging, classification, and preservation. ... (12 Dec 1998) ...

library, arrayed
In genetics, arrayed libraries of DNA clones are used for many purposes, including screening for a specific gene or genomic region of interest as well as for physical mapping. An arrayed library consists of (in technical terms) individual primary recombinant clones (which are hosted in phage, cosmid, yac, or another vector) that have been placed in …

library, genomic
A collection of DNA clones made from a set of randomly generated overlapping DNA fragments representing the entire genome of an organism. As a molecular genetic sequel to john steinbeck's of mice and men , today you can have a mouse genomic library or a human genomic library. ... (12 Dec 1998) ...

libration
1. The act or state of librating. ... 2. <astronomy> A real or apparent libratory motion, like that of a balance before coming to rest. Libration of the moon, any one of those small periodical changes in the position of the moon's surface relatively to the earth, in consequence of which narrow portions at opposite limbs become visible or invis …

libya
A country in northern africa. Its capital is tripoli. The general geographical area has been known since ancient times to the phoenicians, greeks, and romans. It has been in the hands of the italians, the british, the germans, and the french. Libya became independent in 1951. Although the name is very ancient and appeared in egyptian hieroglyphics …

lice
Small parasitic insects that can cause a itching red rash to the skin of the waist, shoulders, armpits, neck and pubic area. Commonly spread from person-to-person via close contact. The eggs (nits) of head lice can be mistaken for dandruff, but they are adherent to the hair shafts. ... Symptoms include itching, eggs visible on hair shafts and lice o …

license
1. Authority or liberty given to do or forbear any act; especially, a formal permission from the proper authorities to perform certain acts or to carry on a certain business, which without such permission would be illegal; a grant of permission; as, a license to preach, to practice medicine, to sell gunpowder or intoxicating liquors. 'To have a lic …

licensure
The legal authority or formal permission from authorities to carry on certain activities which by law or regulation require such permission. It may be applied to licensure of institutions as well as individuals. ... (12 Dec 1998) ...

licensure, dental
The granting of a license to practice dentistry. ... (12 Dec 1998) ...

licensure, hospital
The granting of a license to a hospital. ... (12 Dec 1998) ...

licensure, medical
The granting of a license to practice medicine. ... (12 Dec 1998) ...

licensure, nursing
The granting of a license to practice the profession of nursing. ... (12 Dec 1998) ...

licensure, pharmacy
The granting of a license to practice pharmacy. ... (12 Dec 1998) ...

licentiate
1. One who has a license to exercise a profession; as, a licentiate in medicine or theology. 'The college of physicians, in July, 1687, published an edict, requiring all the fellows, candidates, and licentiates, to give gratuitous advice to the neighboring poor.' (Johnson) ... 2. A friar authorised to receive confessions and grant absolution in all …

lich
A dead body; a corpse. ... <zoology> Lich fowl, the European goatsucker; called also lich owl. Lich gate, a covered gate through which the corpse was carried to the church or burial place, and where the bier was placed to await clergyman; a corpse gate. Lich wake, the wake, or watching, held over a corpse before burial. Lich wall, the wall of …

lichen
A large group of symbiotic associations between fungi and green and occasionally blue green algae. Several genera of algae and of fungi are involved and the associations are so stable and of such varied but distinct types that the lichens have been classified into genera and species. A variety of incompatibility phenomena are often manifest between …

lichen acuminatus
Synonym for lichen planus ... A primary disorder of the skin resulting in violaceous, polygonal, flat skin lesions that often pruritic (itchy). Seen commonly on the wrists, shins, lower back and genitalia. Involvement of the scalp may lead to hair loss. The cause of lichen planus is unknown, but may occur after the use of a drug (thiazide diuretics, …

lichen agrius
Acute papular eczema of severe type. ... Synonym: Celsus' papules. ... (05 Mar 2000) ...

lichen albus
Chronic lichenoid dermatitis with depigmentation. ... (05 Mar 2000) ...

lichen amyloidosis
Synonym for lichenoid amyloidosis ... Localised cutaneous amyloidosis with pruritic brownish-red papules, most commonly on the lower legs, due to amyloid infiltration of the papillary dermis. ... Synonym: amyloidosis cutis, lichen amyloidosis. ... Origin: G. Leichen, lichen, a lichen-like eruption + eidos, resemblance ... (05 Mar 2000) ...

lichen annularis
Synonym for granuloma annulare ... <dermatology> Benign granulomatous disease of unknown aetiology characterised by a ring of localised or disseminated papules or nodules on the skin and palisading histiocytes surrounding necrobiotic tissue resulting from altered collagen structures. ... (12 Dec 1998) ...

lichen haemorrhagicus
A papular eruption due to haemorrhage into the hair follicles. ... (05 Mar 2000) ...

lichen infantum
Synonym for miliaria rubra ... An eruption of papules and vesicles at the orifices of sweat glands, accompanied by redness and inflammatory reaction of the skin. ... Synonym: heat rash, lichen infantum, lichen strophulosus, prickly heat, strophulus, summer rash, tropical lichen, lichen tropicus, wildfire rash. ... (05 Mar 2000) ...

lichen iris
Ringworm with concentric rings of erythematous papules. ... (05 Mar 2000) ...

lichen lichens on bark
A mutualistic association of a fungus andphotosynthetic organism, either a unicellular alga or a cyanobacterium. Some lichens are used to make natural fabric dyes. ... (09 Oct 1997) ...

lichen myxoedematosus
A lichenoid eruption of papules or plaques of mucinous oedema due to deposit of glycosaminoglycans in the skin and fibroblast proliferation, in the absence of endocrine disease. ... See: scleromyxoedema. ... Synonym: papular mucinosis. ... (05 Mar 2000) ...

lichen nitidus
A chronic inflammatory disease characterised by shiny, flat-topped, usually flesh-coloured micropapules no larger than the head of a pin. Lesions are localised in the early stages, found chiefly on the lower abdomen, penis, and inner surface of the thighs. Distribution may become generalised as the disease progresses. ... (12 Dec 1998) ...

lichen nuchae
Lichen simplex of the neck, usually in women. ... (05 Mar 2000) ...

lichen obtusus
A form in which the papules are large and rounded instead of flattened. ... (05 Mar 2000) ...

lichen planopilaris
Follicular hyperkeratosis of the scalp with lymphocytic perifolliculitis and lichen planus elsewhere. ... Synonym: Graham Little syndrome, lichen planus et acuminatus atrophicans. ... (05 Mar 2000) ...

lichen planus
A primary disorder of the skin resulting in violaceous, polygonal, flat skin lesions that often pruritic (itchy). Seen commonly on the wrists, shins, lower back and genitalia. Involvement of the scalp may lead to hair loss. The cause of lichen planus is unknown, but may occur after the use of a drug (thiazide diuretics, phenothiazines, antimalarial …

lichen planus annularis
A form in which the papules are grouped in ring figures. ... (05 Mar 2000) ...

lichen planus follicularis
Lichen planus of the hair follicles, usually of the scalp. ... (05 Mar 2000) ...

lichen planus hypertrophicus
Verrucoid or warty lesions occurring on legs and thighs in association with lichen planus elsewhere. ... Synonym: lichen planus verrucosus, lichen ruber verrucosus. ... (05 Mar 2000) ...

lichen planus verrucosus
Synonym for lichen planus hypertrophicus ... Verrucoid or warty lesions occurring on legs and thighs in association with lichen planus elsewhere. ... Synonym: lichen planus verrucosus, lichen ruber verrucosus. ... (05 Mar 2000) ...

lichen planus-like keratosis
Synonym for lichenoid keratosis ... A solitary benign papule or plaque, with microscopic features resembling lichen planus, occurring on sun-exposed or unexposed skin. ... Synonym: lichen planus-like keratosis. ... (05 Mar 2000) ...

lichen planus, oral
Oral lesions accompanying cutaneous lichen planus or often occurring alone. The buccal mucosa, lips, gingivae, floor of the mouth, and palate are usually affected (in a descending order of frequency). Typically, oral lesions consist of radiating white or gray, velvety, threadlike lines, arranged in a reticular pattern, at the intersection of which …

lichen ruber
An obsolete term for lichen planus. ... (05 Mar 2000) ...

lichen ruber moniliformis
A rare dermatosis consisting of small reddish papules arranged in narrow beaded bands and covering large areas of the body. ... (05 Mar 2000) ...

lichen ruber planus
Synonym for lichen planus ... A primary disorder of the skin resulting in violaceous, polygonal, flat skin lesions that often pruritic (itchy). Seen commonly on the wrists, shins, lower back and genitalia. Involvement of the scalp may lead to hair loss. The cause of lichen planus is unknown, but may occur after the use of a drug (thiazide diuretics, …

lichen ruber verrucosus
Synonym for lichen planus hypertrophicus ... Verrucoid or warty lesions occurring on legs and thighs in association with lichen planus elsewhere. ... Synonym: lichen planus verrucosus, lichen ruber verrucosus. ... (05 Mar 2000) ...

lichen sclerosus et atrophicus
A chronic, atrophic skin disease characterised by white, angular, flat, well-defined, indurated papules with an erythematous halo and follicular, black, keratotic plugs. It is the most common cause of kraurosis vulvae in females and balanitis xerotica obliterans in males. It is called also white spot disease and csillag's disease. ... (12 Dec 1998)< …

lichen scrofulosorum
Small asymptomatic lichen papules on the trunk of children with tuberculosis; acid-fast bacilli are not seen in the dermal granulomas. ... Synonym: acne scrofulosorum, papular scrofuloderma, papular tuberculid. ... (05 Mar 2000) ...

lichen simplex chronicus
A thickened area of itching skin resulting from rubbing and scratching. ... (05 Mar 2000) ...

lichen spinulosus
Eruption of conical papules, of unknown cause, which have an adherent scaly surface; may be related to lichen planus. ... (05 Mar 2000) ...

lichen striatus
A self-limited papular eruption occurring primarily in children (more commonly in females); the lesions are arranged in linear groups and usually occur on one extremity. ... (05 Mar 2000) ...

lichen strophulosus
Synonym for miliaria rubra ... An eruption of papules and vesicles at the orifices of sweat glands, accompanied by redness and inflammatory reaction of the skin. ... Synonym: heat rash, lichen infantum, lichen strophulosus, prickly heat, strophulus, summer rash, tropical lichen, lichen tropicus, wildfire rash. ... (05 Mar 2000) ...

lichen syphiliticus
Synonym for follicular syphilid ... Secondary eruption of small follicular papules, usually appearing as groups of lesions. ... Synonym: acuminate papular syphilid, lichen syphiliticus, miliary papular syphilid. ... (05 Mar 2000) ...

lichen tropicus
Synonym for miliaria rubra ... An eruption of papules and vesicles at the orifices of sweat glands, accompanied by redness and inflammatory reaction of the skin. ... Synonym: heat rash, lichen infantum, lichen strophulosus, prickly heat, strophulus, summer rash, tropical lichen, lichen tropicus, wildfire rash. ... (05 Mar 2000) ...

lichen urticatus
Synonym for papular urticaria ... A sensitivity reaction to insect bites, especially human and pet fleas, seen mostly in young children as wheals followed by papules on exposed areas. ... Synonym: lichen urticatus, prurigo infantilis, urticaria papulosa. ... (05 Mar 2000) ...

lichenification
<dermatology> Hypertrophy of the epidermis, resulting in thickening of the skin with exaggeration of the normal skin markings, giving the skin a leathery barklike appearance, which is caused by prolonged rubbing or scratching. It may arise on seemingly normal skin or it may develop at the site of another pruritic cutaneous disorder. ... (18 No …

lichenization
Synonym for lichenification ... <dermatology> Hypertrophy of the epidermis, resulting in thickening of the skin with exaggeration of the normal skin markings, giving the skin a leathery barklike appearance, which is caused by prolonged rubbing or scratching. It may arise on seemingly normal skin or it may develop at the site of another pruriti …

lichenoid
1. Resembling lichen. ... 2. Accentuation of normal skin markings observed in cases of chronic eczema. ... 3. Microscopically resembling lichen planus. ... (05 Mar 2000) ...

lichenoid amyloidosis
Localised cutaneous amyloidosis with pruritic brownish-red papules, most commonly on the lower legs, due to amyloid infiltration of the papillary dermis. ... Synonym: amyloidosis cutis, lichen amyloidosis. ... Origin: G. Leichen, lichen, a lichen-like eruption + eidos, resemblance ... (05 Mar 2000) ...

lichenoid dermatosis
Any chronic skin eruption, characterised clinically by induration and thickening of the skin with accentuation of skin markings, and microscopically by a band-like lymphocytic infiltration of the papillary dermis. ... (05 Mar 2000) ...

lichenoid eczema
Thickening of skin with accentuated skin lines in eczema. ... Synonym: chronic eczema, eczema hypertrophicum. ... (05 Mar 2000) ...

lichenoid eruptions
Conditions in which there is histological damage to the lower epidermis along with a grouped chronic inflammatory infiltrate in the papillary dermis disturbing the interface between the epidermis and dermis. Lichen planus is the prototype of all lichenoid eruptions. ... (12 Dec 1998) ...

lichenoid keratosis
A solitary benign papule or plaque, with microscopic features resembling lichen planus, occurring on sun-exposed or unexposed skin. ... Synonym: lichen planus-like keratosis. ... (05 Mar 2000) ...

lichens
Thallophytic plants formed by mutualistic combination of an alga and a fungus, the algal component being a green or blue-green alga, and the fungal usually an ascomycete. ... (12 Dec 1998) ...