3. A kind of watch crystal which is more than ordinarily flattened in the center; also, a species of convexoconcave lens for spectacles.
4. A piece of felt to cover the eye of a vicious horse.
5. (Arch.)
Defn: Any surface of semicircular or segmental form; especially, the piece of wall between the curves of a vault and its springing line.
6. An iron shoe at the end of the stock of a gun carriage. Lunette window (Arch.), a window which fills or partly fills a lunette.
LUNG Lung, n. Etym: [OE. lunge, AS. lunge, pl. lungen; akin to D. long, G. lunge, Icel. & Sw. lunga, Dan. lunge, all prob. from the root of E. light. See Light not heavy.] (Anat.)
Defn: An organ for aërial respiration; — commonly in the plural.
My lungs began to crow like chanticleer. Shak.
Note: In all air-breathing vertebrates the lungs are developed from the ventral wall of the esophagus as a pouch which divides into two sacs. In amphibians and many reptiles the lungs retain very nearly this primitive saclike character, but in the higher forms the connection with the esophagus becomes elongated into the windpipe and the inner walls of the sacs become more and more divided, until, in the mammals, the air spaces become minutely divided into tubes ending in small air cells, in the walls of which the blood circulates in a fine network of capillaries. In mammals the lungs are more or less divided into lobes, and each lung occupies a separate cavity in the thorax. See Respiration. Lung fever (Med.), pneumonia. — Lung flower (Bot.), a species of gentian (G. Pneumonanthe). — Lung lichen (Bot.), tree lungwort. See under Lungwort. Lung sac (Zoöl.), one of the breathing organs of spiders and snails.
LUNGE
Lunge, n. Etym: [Also spelt longe, fr. allonge. See Allonge, Long.]
Defn: A sudden thrust or pass, as with a sword.