| tracheal veins | Several small venous trunks from the trachea, emptying into the brachiocephalic veins or the superior vena cava. Synonym: venae tracheales. (05 Mar 2000) |
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| tracheal wall stripe | On a chest radiograph, the linear opacity between air in the trachea and in the right upper lobe. (05 Mar 2000) |
| trachealgia | Pain in the trachea. Origin: trachea + G. Algos, pain (05 Mar 2000) |
| trachealis | See: trachealis muscle. (05 Mar 2000) |
| trachealis muscle | <anatomy> The band of smooth muscular fibres in the fibrous membrane connecting posteriorly the ends of the tracheal rings. Synonym: musculus trachealis. (05 Mar 2000) |
| trachearia | <zoology> A division of Arachnida including those that breathe only by means of tracheae. It includes the mites, ticks, false scorpions, and harvestmen. Source: Websters Dictionary (01 Mar 1998) |
| tracheary | Tracheal; breathing by means of tracheae. <zoology> One of the Trachearia. Source: Websters Dictionary (01 Mar 1998) |
| tracheata | <zoology> An extensive division of arthropods comprising all those which breathe by tracheae, as distinguished from Crustacea, which breathe by means of branchiae. Source: Websters Dictionary (01 Mar 1998) |
| tracheate | <zoology> Breathing by means of tracheae; of or pertaining to the Tracheata. <zoology> Any arthropod having tracheae; one of the Tracheata. Source: Websters Dictionary (01 Mar 1998) |
| tracheid | Water conducting cell forming part of the plant xylem. Contains thick, lignified secondary cells walls, with no protoplast at maturity. Interconnects with neighbouring tracheids through pits, the end walls are not perforated. Compare: vessel elements. (18 Nov 1997) |
| tracheitis | <pathology> Inflammation of the trachea. (18 Nov 1997) |
| trachel- | See: trachelo-. (05 Mar 2000) |
| trachelagra | A gouty or rheumatic affection of the muscles of the neck, producing torticollis. Origin: trachel-+ G. Agra, seizure (05 Mar 2000) |
| trachelalis | Archaic term for longissimus capitis muscle. (05 Mar 2000) |
| trachelectomy | Synonym: cervicectomy. Origin: trachel-+ G. Ektome, excision (05 Mar 2000) |