| jaw reflex | A spasmodic contraction of the temporal muscles following a downward tap on the loosely hanging mandible. Synonym: chin jerk, chin reflex, jaw jerk, mandibular reflex, masseter reflex. (05 Mar 2000) |
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| jaw relation record | A registration of any positional relationship of the mandible in reference to the maxillae. These records may be any of the many vertical, horizontal, or orientation relations. (12 Dec 1998) |
| jaw repositioning | The changing of any relative position of the mandible to the maxillae, by altering the occlusion of the natural or artificial teeth or by surgical means. (05 Mar 2000) |
| jaw skeleton | That part of the skull derived from the embryonic pharyngeal arches; it comprises the facial bones of the facial skeleton (under bone) and is distinct from that part of the skull which forms the neurocranium or braincase. Synonym: cranium viscerale, visceral cranium, jaw skeleton, splanchnocranium. Origin: viscero-+ cranium Cartilaginous viscerocranium, those elements of the foetal skull derived from the second and succeeding pharyngeal arch cartilages. Membranous viscerocranium, membranous bones, developed in the foetal skull, that overlie maxillary and mandibular components of the first pharyngeal arch cartilage. (05 Mar 2000) |
| jaw winking | A paradoxical movement of eyelids associated with movements of the jaw. (05 Mar 2000) |
| jaw, edentulous | The total absence of teeth from either the mandible or the maxilla, but not both. Total absence of teeth from both is mouth, edentulous. Partial absence of teeth in either is jaw, edentulous, partially. (12 Dec 1998) |
| jaw, edentulous, partially | Absence of teeth from a portion of the mandible and/or maxilla. (12 Dec 1998) |
| jaw-winking phenomenon | <syndrome> An increase in the width of the eye lids during chewing, sometimes with a rhythmic elevation of the upper lid when the mouth is open and ptosis when the mouth is closed. Synonym: Gunn phenomenon, Gunn's syndrome, jaw-winking phenomenon, jaw-working reflex, Marcus Gunn phenomenon, Marcus Gunn syndrome. (05 Mar 2000) |
| jaw-winking syndrome | <syndrome> An increase in the width of the eye lids during chewing, sometimes with a rhythmic elevation of the upper lid when the mouth is open and ptosis when the mouth is closed. Synonym: Gunn phenomenon, Gunn's syndrome, jaw-winking phenomenon, jaw-working reflex, Marcus Gunn phenomenon, Marcus Gunn syndrome. (05 Mar 2000) |
| jaw-working reflex | <syndrome> An increase in the width of the eye lids during chewing, sometimes with a rhythmic elevation of the upper lid when the mouth is open and ptosis when the mouth is closed. Synonym: Gunn phenomenon, Gunn's syndrome, jaw-winking phenomenon, jaw-working reflex, Marcus Gunn phenomenon, Marcus Gunn syndrome. (05 Mar 2000) |
| jawfoot | <zoology> See Maxilliped. Source: Websters Dictionary (01 Mar 1998) |
| Jaworski's bodies | Mucous shreds in the gastric contents in hyperchlorhydria. (05 Mar 2000) |
| Jaworski, Walery | <person> Polish physician, 1849-1924. See: Jaworski's bodies. (05 Mar 2000) |
| jay | <ornithology> Any one of the numerous species of birds belonging to Garrulus, Cyanocitta, and allied genera. They are allied to the crows, but are smaller, more graceful in form, often handsomely coloured, and usually have a crest. The European jay (Garrulus glandarius) is a large and handsomely coloured species, having the body pale reddish brown, lighter beneath; tail and wing quills blackish; the primary coverts barred with bright blue and black; throat, tail coverts, and a large spot on the wings, white. Called also jay pie, Jenny jay, and kae. The common blue jay (Cyanocitta cristata), and the related species, are brilliantly coloured, and have a large erectile crest. The California jay (Aphelocoma Californica), the Florida jay (A. Floridana), and the green jay (Xanthoura luxuosa), of Texas and Mexico, are large, handsome, crested species. The Canada jay (Perisoreus Canadensis), and several allied species, are much plainer and have no crest. See Blue jay, and Whisky jack. <zoology> Jay thrush, any one several species of Asiatic singing birds, of the genera Garrulax, Grammatoptila, and related genera of the family Crateropodidae; as; the white-throated jay thrush (G. Albogularis), of India. Origin: F. Geai, OF. Gai, jaj, perh. Fr. OHG. Gahi. Cf. Gay. Source: Websters Dictionary (01 Mar 1998) |
| jayet | <chemical> See Jet. Source: Websters Dictionary (01 Mar 1998) |