Either of two spongy, saclike respiratory organs generally in most vertebrates, occupying the upper body cavity alongside the heart and working to remove carbon-dioxide from blood and provide it with oxygen.
an identical organ in a few invertebrates, including spiders and terrestrial snails.
A biological organ that extracts oxygen through the air.
An organ for aërial respiration; -- frequently when you look at the plural.
among the two spongy or saccular organs, occupying the thorax or top part of the body-cavity, which keep in touch with the pharynx through trachea, and are also the organs of respiration in air-breathing vertebrates.
In entomology, among the breathing organs distinct to those Arachnida whoever tracheal system is altered into several lamellæ superimposed upon one another like leaves of a novel. Also they are known as pulmonary lamellæ and breathing leaflets.
In pulmonate mollusks, a modification for the integument subserving aërial respiration: much more completely called additional lung. Huxley.
plural A bellows-blower; a chemist's servant.
either of two saclike breathing organs in chest of vertebrates; acts to get rid of carbon-dioxide and supply air to your bloodstream