1A large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.
- ‘Minor salivary glands of mucinous type are also located in the nose, paranasal sinuses, the larynx, trachea and bronchi.’
- ‘The larynx, trachea, and bronchi exhibited extensive squamous metaplasia of the mucosa with reactive atypia.’
- ‘If symptoms aren't improving in that time, see your doctor to make sure you don't have a bacterial infection in your lungs, larynx, trachea, sinuses or ears.’
- ‘Additionally, the bronchi, trachea, and larynx demonstrated generalized erythema of the mucosa with overlying thin yellow mucus.’
- ‘The conducting portion of the respiratory system includes the nasal cavity, paranasal sinuses, nasopharynx, larynx, trachea, and bronchi.’
- 1.1Biology Each of a number of fine chitinous tubes in the body of an insect, conveying air directly to the tissues.
- ‘Breathing is by special gas exchange organs along the side of the body called tracheae and malpighian tubules.’
- ‘Although tracheae appear to be compressed synchronously, the shape and direction of compression varies within local tracheal segments, and to a lesser extent, between beetles.’
- ‘Nor would they be able to gasp enough oxygen through their tracheae, the breathing system that limits most insects to the half-inch scale.’
- ‘This was a pretty far out idea, since blood-based gas exchange is what other arthropods use (including aquatic ones) but was previously thought to be completely absent in insects, which deliver air directly to their tissues via tracheae.’
- ‘The lethal phase of Tpl aneuploids is late embryonic or early larval, with the tracheae and the gut the first tissues to be affected.’
- 1.2Botany Any duct or vessel in a plant, providing support and conveying water and salts.
duct, tube, channel, passage, pipeView synonyms
- ‘The formation of nodules of vascular tissue has been described as consisting of tracheas and islands of sieve elements in callus tissue grown in vitro.’
Late Middle English: from medieval Latin, from late Latin trachia, from Greek trakheia (artēria) rough (artery) from trakhus rough.