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