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

oneirodynia gravis
Synonym for nightmare ... 1. A fiend or incubus formerly supposed to cause trouble in sleep. ... 2. A condition in sleep usually caused by improper eating or by digestive or nervous troubles, and characterised by a sense of extreme uneasiness or discomfort (as of weight on the chest or stomach, impossibility of motion or speech, etc), or by frightful …

oneirogmus
Nocturnal emission of semen, often related to erotic dreams. ... See: wet dream. ... Origin: G. Oneirogmos, an effusion of semen during sleep ... (05 Mar 2000) ...

oneirology
The study of dreams and their content. ... Origin: G. Oneiros, dream, + logos, study ... (05 Mar 2000) ...

oneirophrenia
A state in which hallucinations occur, caused by such conditions as prolonged deprivation of sleep, sensory isolation, and a variety of drugs. ... Origin: G. Oneiros, dream, + phren, mind ... (05 Mar 2000) ...

oneiroscopy
Rarely used term for the diagnosis of a person's mental state by an analysis of his dreams. ... Origin: G. Oneiros, dream, + skopeo, to examine ... (05 Mar 2000) ...

oniomania
<psychiatry> Rarely used term for the morbidly exaggerated need or urge to buy beyond the realistic needs of the individual. ... Origin: G. Onios, for sale, + mania, insanity ... (05 Mar 2000) ...

onion
<botany> A liliaceous plant of the genus Allium (A.cepa), having a strong-flavored bulb and long hollow leaves; also, its bulbous root, much used as an article of food. The name is often extended to other species of the genus. ... <zoology> Onion fish, a dipterous insect whose larva feeds upon the onion; especially, Anthomyia ceparum and …

onion bodies
An obsolete term for epithelial nest. ... (05 Mar 2000) ...

onion bulb neuropathy
Designation for any of several demyelinating polyneuropathies in which the nerves are enlarged, due to onion bulb formation-whorls of overlapping Schwann cell processes encircling bare medullated axons, e.g., progressive hypertrophic polyneuropathy. ... See: hypertrophic interstitial neuropathy. ... (05 Mar 2000) ...

onions
Herbaceous biennial plants and their edible bulbs, belonging to the liliaceae. ... (12 Dec 1998) ...

oniric
Synonym for oneiric ... 1. Pertaining to dreams. ... 2. Pertaining to the clinical state of oneirophrenia. ... Synonym: oniric. ... Origin: G. Oneiros, dream ... (05 Mar 2000) ...

onko-
See: onco-. ... (05 Mar 2000) ...

onlay
1. A metal (usually gold) cast restoration of the occlusal surface of a posterior tooth or the lingual surface of an anterior tooth, the entire surface of which is in dentin without side walls; retention in the anterior tooth is by pins and in the posterior by pins and/or boxes in retentive grooves in the buccal and lingual walls. ... 2. A graft app …

onlay graft
A bone graft applied on the outside of the recipient bone(s). ... (05 Mar 2000) ...

online systems
Systems where the input data enter the computer directly from the point of origin (usually a terminal or workstation) and/or in which output data are transmitted directly to that terminal point of origin. ... (12 Dec 1998) ...

only child
Child who has no siblings. ... (12 Dec 1998) ...

Onodi
A., 20th century Hungarian laryngologist. ... See: Onodi cell. ... (05 Mar 2000) ...

Onodi cell
A variant of a posterior ethmoidal air cell in intimate relationship with the optic nerve just distal to the optic chiasm. ... (05 Mar 2000) ...

onomasticon
A collection of names and terms; a dictionary; specif, a collection of Greek names, with explanatory notes, made by Julius Pollux about A.D.180. ... Origin: NL, fr. Gr. (sc), fr. See Onomastic. ... (01 Mar 1998) ...

onomatomania
<psychiatry> An abnormal impulse to dwell upon certain words and their supposed significance, or to frantically try to recall a particular word. ... Origin: G. Onoma, name, + mania, frenzy ... (05 Mar 2000) ...

onomatophobia
<psychology> Abnormal dread of certain words or names because of their supposed significance. ... Synonym: nomatophobia. ... Origin: G. Onoma, name, + phobos, fear ... (05 Mar 2000) ...

onomatopoeia
<philosophy> The formation of words in imitation of sounds; a figure of speech in which the sound of a word is imitative of the sound of the thing which the word represents; as, the buzz of bees; the hiss of a goose; the crackle of fire. ... It has been maintained by some philologist that all primary words, especially names, were formed by imi …

onomatopoiesis
The making of a name or word, especially to express or imitate a natural sound (e.g., hiss, crash, boom); in psychiatry, the tendency to make new words of this type is said to characterise some persons with schizophrenia. ... See: neologism. ... Origin: G. Onoma, name, + poiesis, making ... (05 Mar 2000) ...

onomatopy
Synonym for onomatopoeia ... <philosophy> The formation of words in imitation of sounds; a figure of speech in which the sound of a word is imitative of the sound of the thing which the word represents; as, the buzz of bees; the hiss of a goose; the crackle of fire. ... It has been maintained by some philologist that all primary words, especial …

onomomancy
onomancy ...

ontario
A province of canada lying between the provinces of manitoba and quebec. Its capital is toronto. It takes its name from lake ontario which is said to represent the iroquois oniatariio, beautiful lake. ... (12 Dec 1998) ...

ontogenesis
Synonym for ontogeny ... The total of the stages of an organisms life history. ... (18 Nov 1997) ...

ontogenic homeostasis
Synonym for homeorrhesis ... The set of processes by which imbalances and other defects in ontogeny are corrected before development is completed. ... Synonym: ontogenic homeostasis, waddingtonian homeostasis. ... Origin: homeo-+ G. Rheos, stream, current ... (05 Mar 2000) ...

ontogeny
The total of the stages of an organisms life history. ... (18 Nov 1997) ...

Onuf's nucleus
Small somatic motor neurons in the ventral horn of the spinal cord at sacral 2 level which innervate the vesicorectal sphincters, that is, the external anal and the urethral sphincter; O.'s nucleus has been identified in the cat, dog, and humans. ... (05 Mar 2000) ...

Onufrowicz
Wladislaus, Swiss anatomist, 1836-1900. ... See: Onuf's nucleus. ... (05 Mar 2000) ...

onyalai
An acute disease affecting natives of Central Africa, characterised by bloody vesicles of the mouth and other mucous surfaces, haematuria, and melena; defective nutrition may be the cause. ... Synonym: akembe, kafindo. ... (05 Mar 2000) ...

onych-
See: onycho-. ... (05 Mar 2000) ...

onychalgia
Pain in the nails. ... Origin: onycho-+ G. Algos, pain ... (05 Mar 2000) ...

onychatrophia
Onychatrophy ... Atrophy of the nails. ... Origin: onycho-+ G. Atrophia, atrophy ... (05 Mar 2000) ...

onychauxis
Marked overgrowth of the fingernails or toenails. ... Origin: onycho-+ G. Auxe, increase ... (05 Mar 2000) ...

onychectomy
<procedure> Ablation of a toenail or fingernail. ... Origin: onycho-+ G. Ektome, excision ... (05 Mar 2000) ...

onychia lateralis
Synonym for paronychia ... <dermatology> Inflammation involving the folds of tissue surrounding the nail. ... Synonym: perionychia. ... Origin: Gr. Onyx = nail ... (18 Nov 1997) ...

onychia maligna
Acute onychia occurring spontaneously in debilitated patients, or in response to slight trauma. ... Synonym: Wardrop's disease. ... (05 Mar 2000) ...

onychia periungualis
Synonym for paronychia ... <dermatology> Inflammation involving the folds of tissue surrounding the nail. ... Synonym: perionychia. ... Origin: Gr. Onyx = nail ... (18 Nov 1997) ...

onychia sicca
A condition characterised by brittle nails. ... (05 Mar 2000) ...

onycho-
<prefix> Having to do with the nails. ... (12 Dec 1998) ...

onychoclasis
Breaking of the nails. ... Origin: onycho-+ G. Klasis, breaking ... (05 Mar 2000) ...

onychocryptosis
Synonym: ingrown nail. ... Origin: onycho-+ G. Krypto, to conceal ... (05 Mar 2000) ...

onychodystrophy
Malformation of the nails. Oo-: Prefix meaning egg. Pronounced o'-o. ... (12 Dec 1998) ...

onychograph
An instrument for recording the capillary blood pressure as shown by the circulation under the nail. ... Origin: onycho-+ G. Grapho, to write ... (05 Mar 2000) ...

onychogryphosis
Synonym for onychogryposis ... Enlargement with increased thickening and curvature of the fingernails or toenails. ... Synonym: gryposis unguium, onychogryphosis. ... Origin: onycho-+ G. Gryposis, a curvature ... (05 Mar 2000) ...

onychogryposis
Enlargement with increased thickening and curvature of the fingernails or toenails. ... Synonym: gryposis unguium, onychogryphosis. ... Origin: onycho-+ G. Gryposis, a curvature ... (05 Mar 2000) ...

onychoheterotopia
Abnormal placement of nails. ... (05 Mar 2000) ...

onychoid
Resembling a fingernail in structure or form. ... Origin: onycho-+ G. Eidos, resemblance ... (05 Mar 2000) ...

onychology
Study of the nails. ... Origin: onycho-+ G. Logos, treatise ... (05 Mar 2000) ...

onycholysis
The loosening of the nails starting at the border. ... (27 Sep 1997) ...

onychoma
<tumour> A tumour arising from the nail bed. ... Origin: onycho-+ G. -oma, tumour ... (05 Mar 2000) ...

onychomadesis
Complete shedding of the nails, usually associated with systemic disease. ... Origin: onycho-+ G. Madesis, a growing bald, fr. Madao, to be moist, (of hair) fall off ... (05 Mar 2000) ...

onychomalacia
Abnormal softness of the nails. ... Origin: onycho-+ G. Malakia, softness ... (05 Mar 2000) ...

onychomycosis
A fungal infection that involves the fingernails. Nails generally split, flake and grow too thick. ... (27 Sep 1997) ...

onychonosus
Synonym: onychopathy. ... Origin: onycho-+ G. Nosos, disease ... (05 Mar 2000) ...

onychoosteodysplasia
<syndrome> A hereditary condition with abnormally formed (dysplastic) or absent nails and absent or underdeveloped (hypoplastic) kneecaps (patellae). ... Other features include iliac horns, abnormality of the elbows interfering with full range of motion (pronation and supination) and kidney disease resembling glomerulonephritis which.is often …

onychopathic
Relating to or suffering from any disease of the nails. ... (05 Mar 2000) ...

onychopathology
Study of diseases of the nails. ... (05 Mar 2000) ...

onychopathy
Any disease of the nails. ... Synonym: onychonosus, onychosis. ... Origin: onycho-+ G. Pathos, suffering ... (05 Mar 2000) ...

onychophagia
<psychology> Habitual nailbiting. ... Origin: onycho-+ G. Phago, to eat ... (05 Mar 2000) ...

onychophosis
A growth of horny epithelium in the nail bed. ... Origin: onycho-+ G. Phos, light, + -osis, condition ... (05 Mar 2000) ...

onychophyma
Swelling or hypertrophy of the nails. ... Origin: onycho-+ G. Phyma, growth ... (05 Mar 2000) ...

onychoplasty
A corrective or plastic operation on the nail matrix. ... Origin: onycho-+ G. Plastos, formed, shaped ... (05 Mar 2000) ...

onychoptosis
Falling off of the nails. ... Origin: onycho-+ G. Ptosis, a falling ... (05 Mar 2000) ...

onychorrhexis
Abnormal brittleness of the nails with splitting of the free edge. ... Origin: onycho-+ G. Rhexis, a breaking ... (05 Mar 2000) ...

onychoschizia
Splitting of the nails in layers. ... Origin: onycho-+ G. Schizo, to divide, + -ia, condition ... (05 Mar 2000) ...

onychosis
Synonym for onychopathy ... Any disease of the nails. ... Synonym: onychonosus, onychosis. ... Origin: onycho-+ G. Pathos, suffering ... (05 Mar 2000) ...

onychostroma
Synonym: nail bed. ... Origin: onycho-+ G. Stroma, bedding ... (05 Mar 2000) ...

onychotillomania
<psychiatry> A tendency to pick at the nails. ... Origin: onycho-+ G. Tillo, to pluck, + mania, insanity ... (05 Mar 2000) ...

onychotomy
<procedure> Incision into a toenail or fingernail. ... Origin: onycho-+ G. Tome, cutting ... (05 Mar 2000) ...

onychotrophy
Nutrition of the nails. ... Origin: onycho-+ G. Trophe, nourishment ... (05 Mar 2000) ...

onyx
<chemical> Chalcedony in parallel layers of different shades of colour. It is used for making cameos, the figure being cut in one layer with the next as a ground. Onyx marble, a banded variety of marble or calcium carbonate resembling onyx. It is obtained from Mexico. ... Origin: L, fr. Gr. A claw, finger nail, a veined gem. See Nail, and cf. …

onyxis
Synonym for ingrown nail ... A toenail, one edge of which is overgrown by the nailfold, producing a pyogenic granuloma; due to faulty trimming of the toenails or pressure from a tight shoe. ... Synonym: ingrowing toenail, onychocryptosis, onyxis, unguis aduncus, unguis incarnatus. ... (05 Mar 2000) ...

oo
1. <ornithology> A beautiful bird (Moho nobilis) of the Hawaiian Islands. It yields the brilliant yellow feathers formerly used in making the royal robes. ... Synonym: yellow-tufted honeysucker. ... Origin: Hawaiian. ... 2. <prefix> Meaning egg or ovary. ... See: oophor-, ovario-, ovi-, ovo-. ... Origin: G. Oon, egg. OO- ... Source: Websters …

oocyesis
Synonym for ovarian pregnancy ... Development of an impregnated ovum in an ovarian follicle. ... See: Spiegelberg's criteria. ... Synonym: oocyesis, ovariocyesis. ... (05 Mar 2000) ...

oocyst
<embryology> The encysted form of the fertilised macrogamete, or zygote, in coccidian Sporozoea in which sporogonic multiplication occurs. ... This results in the formation of sporozoites, infectious agents for the next stage of the sporozoan life cycle. ... Origin: G. Oon, egg, + kystis, bladder ... (05 Mar 2000) ...

oocyte
The developing female gamete before completion and release. The female germ cells in stages between the prophase of the first maturation division and the completion of the second maturation division. ... (21 Jun 2000) ...

oocyte donation
<gynaecology> Transfer of egg cell from donor to host mother. Oocytes are captured by laparoscopy, fertilised in vitro, and transferred to the recipient. ... Used for women with premature ovarian failure or severe genetic disorders, women who respond poorly to human menopausal gonadotropin, and women older than 40 years who do not conceive wit …

oocyte expression
<molecular biology> Technique whereby the cellular machinery of an oocyte (typically that of Xenopus) is utilised to transcribe functional protein from microinjected RNA. ... (18 Nov 1997) ...

oogamy
A condition where the gametes of a species are fully differentiated sexually into a tiny and highly mobile male gamete (called a sperm) and a large, nonmoving female gamete (called an egg). ... (09 Oct 1997) ...

oogenesis
The process of egg formation. ... (18 Nov 1997) ...

oogenetic
Producing ova. ... Synonym: oogenic, oogenous, ovigenetic, ovigenic, ovigenous. ... (05 Mar 2000) ...

oogenic
Synonym for oogenetic ... Producing ova. ... Synonym: oogenic, oogenous, ovigenetic, ovigenic, ovigenous. ... (05 Mar 2000) ...

oogonia
The primitive differentiated female gametes which give rise to oocytes. ... (12 Dec 1998) ...

oogonium
Female sexual structure in certain algae and fungi, containing one or more gametes. After fertilization the oogonium contains the oospore. ... (18 Nov 1997) ...

ookinesis
Chromosomal movements of the egg during maturation and fertilization. ... Origin: G. Oon, egg, + kinesis, movement ... (05 Mar 2000) ...

ookinete
The motile zygote of the malarial organism that penetrates the mosquito stomach to form an oocyst under the outer gut lining; the contents of the oocyst subsequently divide to produce numerous sporozoites. ... Synonym: vermicule. ... Origin: G. Oon, egg, + kinetos, motile ... (05 Mar 2000) ...

oolemma
Plasma membrane of the oocyte. ... Origin: G. Oon, egg, + lemma, sheath ... (05 Mar 2000) ...

oomycetes
Group of fungi in which the mycelium is nonseptate, i.e. Lacks cross walls and the nuclei are diploid. Sexual reproduction is oogamous. ... (18 Nov 1997) ...

oomycosis
A mycosis caused by fungi belonging to the class Oomycetes; e.g., rhinosporidiosis, pythiosis. ... (05 Mar 2000) ...

oophagia
Oophagy ... The habitual eating of eggs; subsisting largely on eggs. ... Origin: G. Oon, egg, + phago, to eat ... (05 Mar 2000) ...

oophor-
Oophoro- ... The ovary. ... See: oo-, ovario-. ... Origin: Mod. L. Oophoron, ovary, fr. G. Oophoros, egg-bearing ... (05 Mar 2000) ...

oophoralgia
Synonym: ovarialgia. ... Origin: oophor-+ G. Algos, pain ... (05 Mar 2000) ...

oophore
<botany> An alternately produced form of certain cryptogamous plants, as ferns, mosses, and the like, which bears antheridia and archegonia, and so has sexual fructification, as contrasted with the sporophore, which is nonsexual, but produces spores in countless number. In ferns the oophore is a minute prothallus; in mosses it is the leafy pl …

oophorectomy
<procedure, surgery> The removal of an ovary or ovaries. ... Synonym: ovariectomy. ... Origin: Gr. Ektom = excision ... (18 Nov 1997) ...

oophoritic cyst
Synonym for ovarian cyst ... <gynaecology> The ovary will form a fluid filled cyst on the surface of the ovary each month after an egg is released from the ovary during normal ovulation. Larger cysts can cause pain and bleeding (rupture). ... (27 Sep 1997) ...

oophoro-
See: oophor-. ... (05 Mar 2000) ...

oophorocystectomy
<procedure> Excision of an ovarian cyst. ... (05 Mar 2000) ...