Trachea definition

trākē-ə
In the respiratory system of insects and certain other invertebrates, any of the tubules branching throughout the body and conducting air from the exterior.
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The trachea is the respiratory tract in most land creatures.

An example of a trachea is the tube in the human from the larynx to the bronchi.

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(anatomy) A thin-walled, cartilaginous tube descending from the larynx to the bronchi and carrying air to the lungs.
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In the respiratory tract of most land vertebrates, the tube extending from the larynx to the two bronchi; windpipe.
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(anatomy) A thin-walled, cartilaginous tube descending from the larynx to the bronchi and carrying air to the lungs.
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(zoology) One of the internal respiratory tubes of insects and some other terrestrial arthropods, which are connected to the spiracles and are used for gas exchange.
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The tube in vertebrate animals that leads from the larynx to the bronchial tubes and carries air to the lungs. In mammals the trachea is strengthened by rings of cartilage.
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Any of the tiny tubes originating from the spiracles of many terrestrial arthropods and forming a branching network that brings air directly to body cells.
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(anatomy) A thin-walled, cartilaginous tube connecting the larynx to the bronchi; the windpipe.
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(botany, dated) Xylem vessel.
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(entomology) The respiratory system of insects.
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(zoology) One of the internal respiratory tubes of insects and some other terrestrial arthropods, which are connected to the spiracles and are used for gas exchange.
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(botany) A tracheary element.
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Other Word Forms

Noun

Singular:
trachea
Plural:
tracheae, tracheas

Origin of trachea

  • Middle English trache from Medieval Latin trāchēa from Late Latin trāchīa from Greek (artēriā) trākheia rough (artery), trachea (as opposed to the smooth vessels that carry blood and not air) feminine of trākhus rough

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin trachia (“windpipe"), from Ancient Greek τραχεῖα (trachea, “windpipe")

    From Wiktionary