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

oculopharyngeal dystrophy
A dominantly inherited form of chronic progressive external ophthalmoplegia usually presenting in middle life or old age with chronic ptosis and/or difficulty swallowing. Many sufferers have French-Canadian ancestry. ... (05 Mar 2000) ...

oculopharyngeal syndrome
<syndrome> A myopathic disorder with a slowly progressive blepharoptosis and dysphagia, beginning late in life; autosomal dominant inheritance; there is also a similar autosomal dominant trait. ... (05 Mar 2000) ...

oculoplethysmography
Indirect measurement of the haemodynamic significance of internal carotid artery stenosis or occlusion by demonstration of an ipsilateral delay in the arrival of ocular pressure transmitted from branches of the ophthalmic artery. ... Origin: oculo-+ G. Plethymos, increase, + graphe, to write ... (05 Mar 2000) ...

oculopneumoplethysmography
A method of bilateral measurement of ophthalmic artery pressure that reflects pressure and flow in the internal carotid artery. ... See: oculoplethysmography. ... (05 Mar 2000) ...

oculopupillary
Pertaining to the pupil of the eye. ... (05 Mar 2000) ...

oculosympathetic
Pertaining to the sympathetic pathway to the eye, damage to which produces Horner's syndrome. ... (05 Mar 2000) ...

oculovagal reflex
Synonym for oculocardiac reflex ... A decrease in pulse rate associated with traction on extraocular muscles or compression of the eyeball; especially sensitive in children; may produce asystolic cardiac arrest. ... Synonym: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex, oculovagal reflex. ... (05 Mar 2000) ...

oculovertebral
Relating to the eyes and vertebrae. ... (05 Mar 2000) ...

oculovertebral dysplasia
Microphthalmia, colobomas, or anophthalmia with small orbit, twisted face due to unilateral dysplasia of maxilla, macrostomia with malformed teeth and malocclusion, vertebral malformations, and branched and hypoplastic ribs. ... Synonym: oculovertebral syndrome, Weyers-Thier syndrome. ... (05 Mar 2000) ...

oculovertebral syndrome
Synonym for oculovertebral dysplasia ... Microphthalmia, colobomas, or anophthalmia with small orbit, twisted face due to unilateral dysplasia of maxilla, macrostomia with malformed teeth and malocclusion, vertebral malformations, and branched and hypoplastic ribs. ... Synonym: oculovertebral syndrome, Weyers-Thier syndrome. ... (05 Mar 2000) ...

oculovestibulo-auditory syndrome
<syndrome> A nonsyphilitic interstitial keratitis characterised by an abrupt onset with vertigo and tinnitus followed by deafness; about 50% of patients have an associated systemic disease, most commonly polyarteritis nodosa. ... Synonym: Cogan's syndrome. ... (05 Mar 2000) ...

oculozygomatic
Relating to the orbit or its margin and the zygomatic bone. ... (05 Mar 2000) ...

ocy-
See: oxy-. ... (05 Mar 2000) ...

ocytocin
Synonym: oxytocin. ... Origin: G. Okytokos, fast birth, prompt delivery ... (05 Mar 2000) ...

od
<physics> An alleged force or natural power, supposed, by Reichenbach and others, to produce the phenomena of mesmerism, and to be developed by various agencies, as by magnets, heat, light, chemical or vital action, etc.; called also odyle or the odylic force. 'That od force of German Reichenbach Which still, from female finger tips, burnt bl …

odaxesmus
A biting sensation; a form of paresthesia. ... Origin: G. Odaxesmos, an irritation, fr. Odax (adv.), by biting. ... (05 Mar 2000) ...

odaxetic
1. Causing formication or itching. ... 2. A substance or agent that causes formication or itching. ... Origin: G. Odaxesmos, an irritation ... (05 Mar 2000) ...

odd chromosome
Synonym for accessory chromosome ... A chromosome existing without its normal homologous chromosome; at the reduction division of gametogenesis an accessory chromosome is likely to be included in one daughter cell and not in the other, but may be lost completely by lagging behind on the equatorial plate. ... Synonym: monosome, odd chromosome, unpaire …

odd-pinnate
Said of compound leaves having an odd number of leaflets, this is usually easily determined because there is a single terminal leaflet. ... (09 Oct 1997) ...

odd-year run
Population of fish that returns to spawning grounds in odd-numbered years. ... (09 Oct 1997) ...

Oddi
Ruggero, Italian physician; 1864-1913. ... See: Oddi's sphincter. ... (05 Mar 2000) ...

Oddi, Ruggero
<person> Oddi's Sphincter - sphincteric fibres around the termination of the common bile duct. These had already been described in 1681 by Glisson. ... Lived: 1845-1906. ... (05 Dec 1998) ...

oddi's sphincter
An annular sheath of muscle that invests the bile duct within the wall of the duodenum. ... (12 Dec 1998) ...

odditis
Inflammation of the junction of the duodenum and common bile duct at the sphincter of Oddi. ... (05 Mar 2000) ...

odds
The ratio of probability of occurrence to non-occurrence of an event. ... Origin: pl. Of odd, fr. M.E. Odde, fr. O.Norse oddi, odd number ... (05 Mar 2000) ...

odds ratio
<epidemiology> A comparison of the presence of a risk factor for disease in a sample of diseased subjects and non diseased controls. The number of people with disease who were exposed to a risk factor ( I.e. ) over those with disease who were not exposed ( Io ) divided by those without disease who were exposed ( Ne ) over those without who we …

odogenesis
Synonym: neurocladism. ... Origin: G. Hodos, path, + genesis, source ... (05 Mar 2000) ...

odontagra
Obsolescent term for toothache thought to be of gouty origin. ... Origin: odonto-+ G. Agra, seizure ... (05 Mar 2000) ...

odontalgia dentalis
Reflex pain in the ear due to dental disease, usually propagated along the auriculotemporal nerve. ... Origin: odont-+ G. Algos, pain ... (05 Mar 2000) ...

odontalgic
Relating to or marked by toothache. ... (05 Mar 2000) ...

odontectomy
<procedure> Removal of teeth by the reflection of a mucoperiosteal flap and excision of bone from around the root or roots before the application of force to effect the tooth removal. ... Origin: odont-+ G. Ektome, excision ... (05 Mar 2000) ...

odonterism
Chattering of the teeth. ... Origin: odont-+ G. Erismos, quarrel ... (05 Mar 2000) ...

odontiasis
Synonym for teething ... Eruption or 'cutting' of the teeth, especially of the deciduous teeth. ... Synonym: odontiasis. ... (05 Mar 2000) ...

odontinoid
1. Resembling dentin. ... 2. A small excrescence from a tooth, most common on the root or neck. ... 3. Toothlike. ... (05 Mar 2000) ...

odontitis
Synonym for pulpitis ... Inflammation of the dental pulp, usually due to bacterial infection in dental caries, tooth fracture, or other conditions causing exposure of the pulp to bacterial invasion. Chemical irritants, thermal factors, hyperaemic changes, and other factors may also cause pulpitis. ... (12 Dec 1998) ...

odonto-
A tooth, teeth (properly used in words formed from G. Roots). ... Origin: G. Odous (odont-) ... (05 Mar 2000) ...

odontoameloblastoma
Synonym for ameloblastic odontoma ... <tumour> A benign mixed odontogenic tumour comprised of an undifferentiated component histologically identical to an ameloblastoma and a well differentiated component identical to an odontoma; appears as a mixed radiolucent-radiopaque lesion and presents clinically as an ameloblastoma. ... Synonym: odontoam …

odontoblast
Columnar cells derived from the dental papilla after ameloblasts have differentiated and that give rise to the dentine matrix that underlies the enamel of a tooth. ... (18 Nov 1997) ...

odontoblastic layer
A layer of connective tissue cells at the periphery of the dental pulp of the tooth. ... (05 Mar 2000) ...

odontoblastic process
The extension of the odontoblast which lies within the dentinal tubule; application of stimuli to dentin may cause aspiration of odontoblast contents into the process. ... (05 Mar 2000) ...

odontoblastoma
<tumour> 1. A tumour composed of neoplastic epithelial and mesenchymal cells that may differentiate into cells able to produce calcified tooth substances. ... 2. An odontoma in its early formative stage. ... Origin: odontoblast + G. -oma, tumour ... (05 Mar 2000) ...

odontoclast
One of the cells believed to produce resorption of the roots of the deciduous teeth. ... Origin: odonto-+ G. Klastos, broken ... (05 Mar 2000) ...

odontodynia
Synonym: toothache. ... Origin: odonto-+ G. Odyne, pain ... (05 Mar 2000) ...

odontodysplasia
A localised arrested tooth development which appears to involve most commonly the anterior teeth, usually on one side of the midline, most often the maxillary central and lateral incisors. Roentgenographically, the teeth have a ghostlike appearance. Calcification and bits of prismatic enamel may be found in the pulp and the enamel is thin and absen …

odontogenesis
The process of development of the teeth. ... Synonym: odontogeny, odontosis. ... Origin: odonto-+ G. Genesis, production ... (05 Mar 2000) ...

odontogenesis imperfecta
Synonym for odontodysplasia ... A localised arrested tooth development which appears to involve most commonly the anterior teeth, usually on one side of the midline, most often the maxillary central and lateral incisors. Roentgenographically, the teeth have a ghostlike appearance. Calcification and bits of prismatic enamel may be found in the pulp a …

odontogenic cyst
A cyst derived from odontogenic epithelium. ... Origin: odont-+ G. Genos, birth, origin, + suffix -ic, pertaining to ... (05 Mar 2000) ...

odontogenic cyst, calcifying
A mixed radiolucent-radiopaque lesion of the jaws with features of both a cyst and a solid neoplasm. It is characterised microscopically by an epithelial lining showing a palisaded layer of columnar basal cells, presence of ghost cell keratinization, dentinoid, and calcification. ... (12 Dec 1998) ...

odontogenic cysts
Cysts found in the jaws and arising from epithelium involved in tooth formation. They include follicular cysts (e.g., primordial cyst, dentigerous cyst, multilocular cyst), lateral periodontal cysts, and radicular cysts. They may become keratinised (odontogenic keratocysts). Follicular cysts may give rise to ameloblastomas and, in rare cases, under …

odontogenic dysplasia
Synonym for odontodysplasia ... A localised arrested tooth development which appears to involve most commonly the anterior teeth, usually on one side of the midline, most often the maxillary central and lateral incisors. Roentgenographically, the teeth have a ghostlike appearance. Calcification and bits of prismatic enamel may be found in the pulp a …

odontogenic epithelial cell
Epithelial layer that will give rise to teeth. ... (18 Nov 1997) ...

odontogenic fibroma
<tumour> A rare odontogenic tumour found in soft tissue or as a central bony lesion. The tumour is composed of fibrous connective tissue, odontogenic epithelium, and sometimes calcification. ... (05 Mar 2000) ...

odontogenic keratocyst
A cyst of dental lamina origin with a high recurrence rate and well-defined histologic criteria of a corrugated parakeratin surface, uniformly thin epithelium, and a palisaded basal layer. One manifestation of the basal cell nevus syndrome. ... (05 Mar 2000) ...

odontogenic myxoma
<tumour> A benign, expansile, multilocular radiolucent neoplasm of the jaws consisting of myxomatous fibrous connective tissue; presumably derived from the mesenchymal components of the odontogenic apparatus. ... (05 Mar 2000) ...

odontogenic tumours
Neoplasms produced from tooth-forming tissues. ... (12 Dec 1998) ...

odontoid ligament
Synonym for alar folds ... Winglike lateral fringes or expansions of the plica synovialis infrapatellaris. ... Synonym: ligamenta alaria, plicae alares, alar ligaments, odontoid ligament. ... (05 Mar 2000) ...

odontoid process
The toothlike process on the upper surface of the axis, which articulates with the atlas above. ... (12 Dec 1998) ...

odontoid process of epistropheus
Synonym for dens ... Synonym: Tooth. ... 2. A strong toothlike process projecting upward from the body of the axis, or epistropheus, around which the atlas rotates. ... Synonym: odontoid process of epistropheus, odontoid process. ... Origin: L. ... (05 Mar 2000) ...

odontoid vertebra
Synonym for axis ... <botany> A stem, commonly used for the main stem of a whole plant or of an inflorescence. ... (09 Oct 1997) ...

odontoloxia
Odontoloxy ... Synonym: odontoparallaxis. ... Origin: odonto-+ G. Loxos, slanting ... (05 Mar 2000) ...

odontolysis
Synonym: erosion. ... Origin: odonto-+ G. Lysis, dissolution ... (05 Mar 2000) ...

odontoma
A mixed tumour of odontogenic origin, in which both the epithelial and mesenchymal cells exhibit complete differentiation, resulting in the formation of tooth structures. ... (12 Dec 1998) ...

odontoneuralgia
Facial neuralgia caused by a carious tooth. ... (05 Mar 2000) ...

odontonomy
<procedure> Dental nomenclature. ... Origin: odonto-+ G. Onoma, name ... (05 Mar 2000) ...

odontonosology
Synonym: dentistry. ... Origin: odonto-+ G. Nosos, disease, + logos, study ... (05 Mar 2000) ...

odontoparallaxis
Irregularity of the teeth. ... Synonym: odontoloxia, odontoloxy. ... Origin: odonto-+ G. Parallax, alternately ... (05 Mar 2000) ...

odontopathy
Any disease of the teeth or of their sockets. ... Origin: odonto-+ G. Pathos, suffering ... (05 Mar 2000) ...

odontophobia
<psychology> Morbid fear of teeth. ... Origin: odonto-+ G. Phobos, fear ... (05 Mar 2000) ...

odontophore
<marine biology> A special structure found in the mouth of most mollusks, except bivalves. It consists of several muscles and a cartilage which supports a chitinous radula, or lingual ribbon, armed with teeth. Also applied to the radula alone. See Radula. ... Origin: Odonto- + Gr. To bear. ... (19 Mar 1998) ...

odontoplasty
Surgical contouring of tooth surface to enhance plaque control and gingival morphology. ... Origin: odonto-+ G. Plasso, to mold ... (05 Mar 2000) ...

odontoprisis
Grinding together of the teeth. ... See: bruxism. ... Origin: odonto-+ G. Prisis, a sawing, a grinding ... (05 Mar 2000) ...

odontoptosis
Downward movement of an upper tooth due to the loss of its lower antagonist(s). ... See: supereruption. ... Origin: odonto-+ G. Ptosis, a falling ... (05 Mar 2000) ...

odontorrhagia
Profuse bleeding from the socket after the extraction of a tooth. ... Origin: odonto-+ G. Rhegnymi, to burst forth ... (05 Mar 2000) ...

odontoschism
Fissure of a tooth. ... Origin: odonto-+ G. Schisma, a cleft ... (05 Mar 2000) ...

odontoscope
<instrument> An optical device, similar to a closed circuit television system, that projects a view of the oral cavity onto a screen for multiple viewing. ... (05 Mar 2000) ...

odontoscopy
1. Examination of the oral cavity by means of the odontoscope. ... 2. Examination of the markings in prints of the cutting edges of the teeth; used, like fingerprints, as a method of personal identification. ... Origin: odonto-+ G. Skopeo, to view ... (05 Mar 2000) ...

odontosis
Synonym for odontogenesis ... The process of development of the teeth. ... Synonym: odontogeny, odontosis. ... Origin: odonto-+ G. Genesis, production ... (05 Mar 2000) ...

odontotherapy
Treatment of diseases of the teeth. ... (05 Mar 2000) ...

odontotomy
<procedure> Cutting into the crown of a tooth. ... Origin: odonto-+ G. Tome, incision ... Prophylactic odontotomy, a preventive operation in which imperfectly formed developmental grooves, pits, and fissures are opened up by means of a bur and filled in order to obviate future decay. ... (05 Mar 2000) ...

odour
A volatile emanation that is perceived by the sense of smell. ... (18 Nov 1997) ...

odourant
A substance with an odour. ... (05 Mar 2000) ...

odourant binding protein
Proteins in nasal mucus that bind lipophilic odour-producing molecules and transfer them to the olfactory receptors. Similar proteins may mediate taste. ... (05 Mar 2000) ...

odouratism
See: lathyrism, osteolathyrism. ... Origin: fr. Lathyrus odouratus, sweet pea ... (05 Mar 2000) ...

odouriferous
Having a scent, perfume, or odour. ... Synonym: odourous. ... Origin: odour + L. Fero, to bear ... (05 Mar 2000) ...

odouriferous gland
A gland, such as Tyson's gland, the secretion of which has a strong odour. ... See: sweat glands. ... (05 Mar 2000) ...

odourimeter
Instrument for performing odourimetry. ... (05 Mar 2000) ...

odourimetry
The determination of the comparative power of different substances in exciting olfactory sensations. ... Origin: odour + G. Metron, measure ... (05 Mar 2000) ...

odourivection
Conveying or bearing an odour, as on the air. ... Origin: odour + L. Vector, a carrier ... (05 Mar 2000) ...

odourography
Description of odours. ... Origin: odour + G. Graphe, a description ... (05 Mar 2000) ...

odourous
Synonym for odouriferous ... Having a scent, perfume, or odour. ... Synonym: odourous. ... Origin: odour + L. Fero, to bear ... (05 Mar 2000) ...

odours
The volatile portions of substances perceptible by the sense of smell. ... (12 Dec 1998) ...

odyn-
Odyno- ... Pain. ... Origin: G. Odyne ... (05 Mar 2000) ...

odynacusis
Hypersensitiveness of the organ of hearing, so that noises cause actual pain. ... Origin: odyn-+ G. Akouo, to hear ... (05 Mar 2000) ...

odynometer
Synonym: algesiometer. ... Origin: odyno-+ G. Metron, measure ... (05 Mar 2000) ...

odynophagia
Pain on swallowing ... Origin: Gr. Phagein = to eat ... (27 Sep 1997) ...

odynophonia
Pain on using the voice. ... Origin: odyno-+ G. Phone, sound, voice ... (05 Mar 2000) ...

Oe
Symbol for oersted. ... (05 Mar 2000) ...

oecology
<biology, study> The various relations of animals and plants to one another and to the outer world. ... Origin: Gr. House. ... (04 Mar 1998) ...

oedema
<clinical sign> The presence of abnormally large amounts of fluid in the intercellular tissue spaces of the body, usually applied to demonstrable accumulation of excessive fluid in the subcutaneous tissues. ... Oedema may be localised, due to venous or lymphatic obstruction or to increased vascular permeability or it may be systemic due to hea …

oedema disease
An acute, highly fatal disease of young pigs caused by toxins of the bacterium Escherichia coli and characterised by oedema of various parts of the body but particularly the walls of the gastrointestinal tract. ... (05 Mar 2000) ...