[trey-kee-uhl or, esp. British, truh-kee-uhl]
Anatomy, Zoology. pertaining to or connected with the trachea or tracheae.
Botany. of the nature of or composed of tracheae or vessels.

1700–10; trache(a) + -al1

posttracheal, adjective
pretracheal, adjective
transtracheal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
trachea (trəˈkiːə)
n , pl -cheae
1.  anatomy, zoology Nontechnical name: windpipe the membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi
2.  any of the tubes in insects and related animals that convey air from the spiracles to the tissues
3.  botany vessel another name for tracheid
[C16: from Medieval Latin, from Greek trakheia, shortened from (artēria) trakheia rough (artery), from trakhus rough]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
As the tracheal cartilage gets stronger and the trachea grows, the noisy respirations and breathing difficulties gradually stop.
The tracheal part of the procedure could get even more complex.
He helped take care of her, suctioning her tracheal tube in the middle of the night when the alarm went off.
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