| trismic | Relating to or marked by trismus. (05 Mar 2000) |
|---|---|
| trismoid | 1. Resembling trismus. 2. Trismus nascentium, formerly regarded as a distinct variety due to pressure on the occiput during birth. Origin: trismus + G. Eidos, resemblance (05 Mar 2000) |
| trismus | <neurology> Motor disturbance of the trigeminal nerve, especially spasm of the masticatory muscles, with difficulty in opening the mouth, a characteristic early symptom of tetanus. Synonym: lockjaw. Origin: Gr. Trismos = grating, grinding (18 Nov 1997) |
| trismus dolorificus | <neurology> A disorder of trigeminal nerve (cranial nerve V) dysfunction. Synonym: tic douloureux. Characterised by excruciating paroxysms of pain in the lips, gums, cheek or chin, and, very rarely, in the distribution of the eye (ophthalmic division of the trigeminal nerve). (27 Sep 1997) |
| trismus nascentium | Stiffness of the jaw muscles in neonates, usually as the beginning of tetanus neonatorum. Synonym: trismus neonatorum. (05 Mar 2000) |
| trismus neonatorum | Stiffness of the jaw muscles in neonates, usually as the beginning of tetanus neonatorum. Synonym: trismus neonatorum. (05 Mar 2000) |
| trismus sardonicus | The semblance of a grin caused by facial spasm especially in tetanus. Synonym: canine spasm, cynic spasm, risus sardonicus, sardonic grin, spasmus caninus, trismus sardonicus. Origin: L. Risus, laugh + caninus, doglike (05 Mar 2000) |
| trisnitrate | <chemistry> A nitrate formed from three molecules of nitric acid; also, less properly, applied to certain basic nitrates; as, trisnitrate of bismuth. Origin: Gr. Thrice + E. Nitrate. Source: Websters Dictionary (01 Mar 1998) |
| trisoctahedron | <chemistry> A solid of the isometric system bounded by twenty-four equal faces, three corresponding to each face of an octahedron. Tetragonal trisoctahedron, a trisoctahedron each face of which is a quadrilateral; called also trapezohedron and icositetrahedron. Trigonal trisoctahedron, a trisoctahedron each face of which is an isosceles triangle. Origin: Gr. Thrice + FE. Octahedron. Source: Websters Dictionary (01 Mar 1998) |
| trisomic | Relating to trisomy. (05 Mar 2000) |
| trisomy | <genetics, molecular biology> Term which indicates the presence of an additional whole chromosome. Each cell usually has 46 but in trisomy this is increased to 47. (13 Nov 1997) |
| trisomy 13 syndrome | <syndrome> A condition with three rather than the normal two chromosomes 13. Children born with this syndrome have multiple malformations and mental retardation due to the extra chromosome 13. The congenital malformations (birth defects) commonly include scalp defects, haemangiomas (blood vessel malformations) of the face and nape of the neck, cleft lip and palate, malformations of the heart and abdominal organs, and flexed fingers with extra digits. The mental retardation is profound. The iq is untestably low. The majority of trisomy 13 babies die soon after birth or in infancy. The condition is also called patau syndrome after the late geneticist klaus patau (at the university of wisconsin) who discovered the extra chromosome in 1960. (17 Dec 1998) |
| trisomy 18 syndrome | <syndrome> There are three instead of the normal two chromosomes 18. Children with this condition have multiple malformations and mental retardation due to the extra chromosome 18. The children characteristically have low birth weight, small head (microcephaly), small jaw (micrognathia), malformations of the heart and kidneys, clenched fists with abnormal finger positioning, and malformed feet. The mental retardation is profound with the iq too low to even test. Nineteen out of 20 (95%) of these children die before their first birthday. The condition is also called edwards syndrome in honor of the british physician and geneticist john edwards who discovered the extra chromosome in 1960. (12 Dec 1998) |
| trisomy 20 syndrome | <syndrome> Profound mental retardation with coarse facies, macrostomia and macroglossia, minor anomalies of the ears, pigmentary dysplasia of the skin, dorsal kyphoscoliosis, and other skeletal defects. (05 Mar 2000) |
| trisomy 21 | <genetics, molecular biology> A congenital condition which is characterised by moderate to severe mental retardation, slanting eyes, a broad short skull, broad hands and short fingers. Other congenital abnormalities include heart defects, oesophageal atresia and an increased incidence of acute lymphocytic leukaemia. All of these findings are secondary to trisomy (an extra chromosome) of the 21st chromosome. Trisomy 21 can be detected in the first few months of pregnancy by amniocentesis. Risk factors include prior Down's child and mothers who become pregnant after age 40. Synonym: Down's syndrome. (27 Sep 1997) |