Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Anatomy A thin-walled, cartilaginous tube descending from the larynx to the bronchi and carrying air to the lungs. Also called windpipe.
  • n. Zoology One of the internal respiratory tubes of insects and some other terrestrial arthropods.
  • n. Botany One of the tubular conductive vessels in the xylem of vascular plants.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A thin-walled, cartilaginous tube connecting the larynx to the bronchi; the windpipe.
  • n. xylem vessel
  • n. the respiratory system of insects

from the GNU version of the Collaborative International Dictionary of English

  • n. The windpipe. See Illust. of Lung.
  • n. One of the respiratory tubes of insects and arachnids.
  • n. One of the large cells in woody tissue which have spiral, annular, or other markings, and are connected longitudinally so as to form continuous ducts.

from The Century Dictionary and Cyclopedia

  • n. In anatomy and zoäl.: The principal air-passage of the body; the windpipe, beginning at the larynx and ending at the bronchial tubes. In Arthropoda, as insects, one of the tubes which traverse the body and generally open by stigmata upon the exterior, thus bringing air to the blood and tissues generally, and constituting special respiratory organs.
  • n. In botany, a duct or vessel; a row or chain of cells that have lost their intervening partitions and have become a single long canal or vessel.
  • n. A notable genus of noctuid moths, containing one species, T. piniperda, known to English collectors as the pinebeauty.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi
  • n. one of the tubules forming the respiratory system of most insects and many arachnids

Etymologies

Middle English trache, from Medieval Latin trāchēa, from Late Latin trāchīa, from Greek (artēria) trākheia, rough (artery), trachea (as opposed to the smooth vessels that carried blood and not air), feminine of trākhus, rough.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin trachia ("windpipe"), from Ancient Greek τραχεῖα (trachea, "windpipe") (Wiktionary)

Examples

  • The pressure effects may be entirely referable to the trachea -- _thymus stenosis of the trachea_ -- giving rise to progressive dyspnœa accompanied by stridor, with paroxysmal exacerbations during which the child becomes asphyxiated.

    Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition.

  • In this surgery, the damaged part of the trachea is removed and the remaining ends are joined together.

    Tracheal Stenosis

  • In this surgery, the narrow part of the trachea is cut through horizontally.

    Tracheal Stenosis

  • A surgical procedure in which a damaged section of the trachea is removed and the ends of the trachea are reconnected.

    Glossary

  • But the trachea is a strange place for colo-rectal cancer to matastisize, so you can probably blame my individual cancer for the unexpected response to the drug.

    Robert Schwab: In the Chemo Room: Out With a Tumor

  • He takes his last few breaths through the stump of his trachea, which is more like a snorkel now.

    At the Bar

  • The operation typically involves making an incision in the neck up, up and down here, and then actually finding the trachea, which is just behind -- just underneath the skin there.

    CNN Transcript Feb 24, 2005

  • If we only remember that all the bronchial tubes, great and small, are hollow, we may compare the whole system to a short bush or tree growing upside down in the chest, of which the trachea is the trunk, and the bronchial tubes the branches of various sizes.

    A Practical Physiology

  • The respiratory system may be likened in form to a well branched tree, with hollow trunk, limbs and leaves: The trachea is the trunk; the two bronchi, one going to the right side and the other to the left side, are the main branches; the bronchioles and their subdivisions are the smaller branches and twigs; the air cells are the leaves.

    Maintaining Health Formerly Health and Efficiency

  • The trachea, which is already surrounded by distinct cartilaginous rings, is long, and of about the same diameter throughout.

    Development of the Digestive Canal of the American Alligator

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