| tectiviridae | A family of lipid-containing bacteriophages with double capsids which infect both gram-negative and gram-positive bacteria. It has one genus, tectivirus. (12 Dec 1998) |
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| tectobulbar tract | Fibres originating in the deep layers of the superior colliculus and accompanying the tectospinal tract but, unlike the latter, terminating in medial regions of the pontine and medullary tegmentum. Synonym: tractus tectobulbaris. (05 Mar 2000) |
| tectocephalic | Synonym: scaphocephalic. Origin: L. Tectum, roof, + G. Kephale, head (05 Mar 2000) |
| tectocephaly | <anatomy> A deformed condition of the skull, in which the vault is narrow, clongated, and more or less boat-shaped. Origin: Gr. A boat + head. Source: Websters Dictionary (01 Mar 1998) |
| tectology | <biology> A division of morphology created by Haeckel; the science of organic individuality constituting the purely structural portion of morphology, in which the organism is regarded as composed of organic individuals of different orders, each organ being considered an individual. See Promorphology, and Morphon. Origin: Gr. A carpenter. Source: Websters Dictionary (01 Mar 1998) |
| tectonic | 1. Relating to variations in structure in the eye, particularly the cornea. 2. Obsolete term denoting plastic surgery or the restoration of lost parts by grafting. Origin: G. Tektonikos, relating to building (05 Mar 2000) |
| tectonic keratoplasty | Grafting to replace lost corneal tissue. (05 Mar 2000) |
| tectopontine tract | A fibre bundle arising in the superior colliculus, passing caudoventrally on the same side along the medial side of the lateral lemniscus, issuing fibres terminating in the lateral zone of the mesencephalic tegmentum, and ending in the lateral part of the gray matter of the ventral part of the pons. Synonym: tract of Munzer and Wiener, tractus tectopontinus. (05 Mar 2000) |
| tectorial | <anatomy> Of or pertaining to covering; applied to a membrane immediately over the organ of Corti in the internal ear. Origin: L. Tectorius. Source: Websters Dictionary (01 Mar 1998) |
| tectorial membrane | A gelatinous membrane, attached to the bony spiral lamina, which overlies the hair cells within the cochlea of the inner ear. (12 Dec 1998) |
| tectorial membrane of cochlear duct | A gelatinous membrane that overlies the spiral organ (Corti) in the inner ear. Synonym: membrana tectoria ductus cochlearis, Corti's membrane, tectorium. (05 Mar 2000) |
| tectorium | 1. An overlaying structure. Synonym: tectorial membrane of cochlear duct. Origin: L. An overlaying surface (plaster, stucco), fr. Tego, pp. Tectus, to cover (05 Mar 2000) |
| tectospinal | Denoting nerve fibres passing from the mesencephalic tectum to the spinal cord. (05 Mar 2000) |
| tectospinal decussation | See: tegmental decussations. (05 Mar 2000) |
| tectospinal tract | A bundle of thick, heavily myelinated fibres originating in the deep layers of the superior colliculus, crossing to the opposite side in the dorsal tegmental decussation, descending along the median plane, between the medial longitudinal fasciculus dorsally, the medial lemniscus ventrally, into the anterior funiculus of the spinal cord. The tract ends in the medial region of the anterior horn of the cervical spinal cord, and appears to be involved in head movements during visual and auditory tracking. Throughout its course in the brainstem it is accompanied by fibres of the tectobulbar tract. Synonym: tractus tectospinalis, Held's bundle, Loewenthal's bundle, Loewenthal's tract, Marchi's tract, predorsal bundle. (05 Mar 2000) |