| tracheal triangle | The triangle bounded by the sternocleidomastoid muscle, the superior belly of the omohyoid muscle, and the anterior midline of the neck; the infrahyoid muscles occupy most of it. Synonym: trigonum musculare, trigonum omotracheale, inferior carotid triangle, omotracheal triangle, tracheal triangle. (05 Mar 2000) |
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| tracheal tube | A flexible tube inserted nasally, orally, or through a tracheotomy into the trachea to provide an airway, as in tracheal intubation. Synonym: endotracheal tube, intratracheal tube. (05 Mar 2000) |
| tracheal tug | A downward pull of the trachea, manifested by a downward movement of the thyroid cartilage, synchronous with the action of the heart and symptomatic of aneurysm of the aortic arch; the sign is elicited most easily by drawing the cricoid cartilage upward with the thumb and forefinger while the patient sits with head thrown back and mouth closed, a jerky type of inspiration seen when the intercostal muscles and the sternocostal parts of the diaphragm are paralysed by deep general anaesthesia or muscle relaxants; due to the unopposed action of the crura pulling on the dome of the diaphragm and thence on the pericardium, lung roots, and tracheobronchial tree during each inspiration. (05 Mar 2000) |
| tracheal ulceration | Erosion of the tracheal mucous membrane with, in some cases, exposure of the rings, at the site at which a cuffed tracheostomy tube has been present for some time. (05 Mar 2000) |
| 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) |
| 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) |