tracheal

[ trey-kee-uhl or, especially British, truh-kee-uhl ]

adjective

Origin of tracheal

First recorded in 1700–10; trache(a) + -al¹

Respiration tracheal or branchial: the openings for the entrance of the air spiraculiform (stigmatiformes).
An Introduction to Entomology: Vol. III (of 4) | William Kirby
He believed that the "air-vessels" or tracheal elements, tended to draw the plant upwards, and the roots to pull it downwards.
Makers of British Botany; a collection of biographies by living botanists | Various
The tracheal rings are thus exposed and can be divided as before.
A System of Operative Surgery, Volume IV (of 4) | Various
There were several enlarged bronchial glands at the root of both lungs; and the tracheal glands contained black fluid.
An Investigation into the Nature of Black Phthisis | Archibald Makellar
The tracheal glands when examined, contained black fluid, similar in appearance to what was found in the bronchial glands.
An Investigation into the Nature of Black Phthisis | Archibald Makellar

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