tracheo-, trache-

(Greek: windpipe; originally, "rough" artery)

Aristotle, like other ancients, believed that the arteries contained air. As a result, he distinguished between the artery par excellence, which he called "the smooth artery" and the windpipe, which he named "the rough artery".
Klein's Comprehensive Etymological Dictionary of the English Language by Dr. Ernest Klein
(New York: Elsevier Publishing Company; 1967), p. 1635.

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