Lunate, Lunated Lu"nate, Lu"na·ted adjective [ Latin lunatus crescent-shaped, past participle of lunare to bend like a crescent, from luna the moon.] Crescent-shaped; as, a lunate leaf; a lunate beak; a lunated cross. Gray.

Lunatic Lu"na·tic adjective [ French lunatique , Latin lunaticus , from luna the moon. See Lunar .] 1. Affected by lunacy; insane; mad.

Lord, have mercy on my son; for he is lunatic .

Wyclif (Matt. xvii. 15).

2. Of or pertaining to, or suitable for, an insane person; evincing lunacy; as, lunatic gibberish; a lunatic asylum.

Lunatic Lu"na·tic noun A person affected by lunacy; an insane person, esp. one who has lucid intervals; a madman; a person of unsound mind.

The lunatic , the lover, and the poet,
Are of imagination all compact.

Shak.

Lunation Lu·na"tion noun [ Confer Lunated .] The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 29¼ to 29⅚ days, the average length being 29 d., 12h., 44m., 2.9s.

Lunch Lunch noun [ Of uncertain etymol. Confer Prov. Eng. nunc a lump.] A luncheon; specifically, a light repast between breakfast and dinner.

Lunch Lunch intransitive verb [ imperfect & past participle Lunched ; present participle & verbal noun Lunching .] To take luncheon. Smart.

Luncheon Lunch"eon noun [ Prov. English luncheon , lunchion , lunshin , a large lump of food, from lunch . See Lunch .]

1. A lump of food. [ Prov. Eng.]

2. A portion of food taken at any time except at a regular meal; an informal or light repast, as between breakfast and dinner.

Luncheon Lunch"eon intransitive verb To take luncheon. Beaconsfield.

Lune Lune noun [ Latin luna moon: confer French lune . See Luna .] 1. Anything in the shape of a half moon. [ R.]

2. (Geom.) A figure in the form of a crescent, bounded by two intersecting arcs of circles.

3. A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak. [ Obsolete]

These dangerous, unsafe lunes i' the king.

Shak.

Lunet Lu"net noun [ See Lunette .] A little moon or satellite. [ Obsolete] Bp. Hall.

Lunette Lu·nette" noun [ French, dim. of lune moon, Latin luna . See Lune a crescent.] 1. (Fort.) A fieldwork consisting of two faces, forming a salient angle, and two parallel flanks. See Bastion .

2. (Far.) A half horseshoe, which wants the sponge.

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. (Architecture) 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 (Architecture) , a window which fills or partly fills a lunette.

Lung Lung (lŭng) noun [ Middle English lunge , Anglo-Saxon lunge , plural lungen ; akin to Dutch long , German lunge , Icelandic & Swedish lunga , Danish lunge , all probably from the root of English light . √125. See Light not heavy.] (Anat.) An organ for aėrial respiration; -- commonly in the plural.

My lungs began to crow
like chanticleer.

Shak.

» 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 (Medicine) , pneumonia. -- Lung flower (Botany) , a species of gentian ( G. Pneumonanthe ). -- Lung lichen (Botany) , tree lungwort. See under Lungwort . -- Lung sac (Zoology) , one of the breathing organs of spiders and snails.

Lung-grown Lung"-grown` adjective (Medicine) Having lungs that adhere to the pleura.

Lunge Lunge noun [ Also spelt longe , from allonge . See Allonge , Long .] A sudden thrust or pass, as with a sword.

Lunge Lunge intransitive verb [ imperfect & past participle Lunged ; present participle & verbal noun Lunging .] To make a lunge.

Lunge Lunge transitive verb To cause to go round in a ring, as a horse, while holding his halter. Thackeray.

Lunge Lunge noun (Zoology) Same as Namaycush .

Lunged Lunged adjective Having lungs, or breathing organs similar to lungs.

Lungfish Lung"fish` noun (Zoology) Any fish belonging to the Dipnoi; -- so called because they have both lungs and gills.

Lungie Lun"gie noun (Zoology) A guillemot. [ Written also longie .] [ Prov. Eng. & Scot.] Sir W. Scott.

Lungis Lun"gis noun [ Old French longis . See Lounge .] A lingerer; a dull, drowsy fellow. [ Obsolete]

Lungless Lung"less adjective Being without lungs.

Lungoor Lun"goor noun [ Hind. langūr .] (Zoology) A long-tailed monkey ( Semnopithecus schislaceus ), from the mountainous districts of India.

Lungworm Lung"worm` noun (Zoology) Any one of several species of parasitic nematoid worms which infest the lungs and air passages of cattle, sheep, and other animals, often proving fatal. The lungworm of cattle ( Strongylus micrurus ) and that of sheep ( S. filaria ) are the best known.

Lungwort Lung"wort` noun (Botany) (a) An herb of the genus Pulmonaria ( P. officinalis ), of Europe; -- so called because the spotted appearance of the leaves resembles that of a diseased lung. (b) Any plant of the genus Mertensia (esp. M. Virginica and M. Sibirica ) plants nearly related to Pulmonaria . The American lungwort is Mertensia Virginica , Virginia cowslip. Gray.

Cow's lungwort mullein. -- Sea lungwort , Mertensia maritima , found on the seacoast of Northern Europe and America. -- Tree lungwort , a lichen ( Sticta pulmonacea ) growing on trees and rocks. The thallus is lacunose, and in appearance somewhat resembles the lungs, for diseases of which it was once thought a remedy.

Lunicurrent Lu"ni·cur"rent adjective [ Latin luna moon + English current .] Having relation to changes in currents that depend on the moon's phases. Bache.

Luniform Lu"ni·form adjective [ Latin luna moon + -form : confer French luniforme .] Resembling the moon in shape.

Lunisolar Lu"ni·so"lar adjective [ Latin luna moon + English solar : confer French lunisolaire .] Resulting from the united action, or pertaining to the mutual relations, of the sun and moon.

Lunisolar precession (Astron.) , that portion of the annual precession of the equinoxes which depends on the joint action of the sun and moon. -- Lunisolar year , a period of time, at the end of which, in the Julian calendar, the new and full moons and the eclipses recur on the same days of the week and month and year as in the previous period. It consists of 532 common years, being the least common multiple of the numbers of years in the cycle of the sun and the cycle of the moon.

Lunistice Lu"ni·stice noun [ Latin luna moon + sistere to cause to stand. Confer Solstice .] (Astron.) The farthest point of the moon's northing and southing, in its monthly revolution. [ Obsolete]

Lunitidal Lu"ni·tid`al adjective Pertaining to tidal movements dependent on the moon. Bache.

Lunitidal interval . See Retard , noun

Lunt Lunt noun [ Dutch lont ; akin to Dan. & German lunte , Swedish lunta . Confer Link a torch.] 1. The match cord formerly used in firing cannon.

2. A puff of smoke. [ Scotch.] Burns.

Lunula Lu"nu·la noun ; plural Lunulę . [ Latin , prop., a little moon. See Lunule .] (Anat. & Zoology) Same as Lunule .

Lunular Lu"nu·lar adjective [ Confer French lunulaire . See Lunula .] (Botany) Having a form like that of the new moon; shaped like a crescent.

Lunulate, Lunulated Lu"nu·late, Lu"nu·la`ted adjective [ See Lunula .] (Bot. & Zoology) Resembling a small crescent. Gray.

Lunule Lu"nule noun [ French, from Latin lunula , dim. of luna moon.] 1. (Anat.) Anything crescent-shaped; a crescent-shaped part or mark; a lunula; a lune.

2. (Chemistry) A lune. See Lune .

3. (Zoology) (a) A small or narrow crescent. (b) A special area in front of the beak of many bivalve shells. It sometimes has the shape of a double crescent, but is oftener heart-shaped. See Illust. of Bivalve .

Lunulet Lu"nu·let noun [ Dim. of lunule .] (Zoology) A small spot, shaped like a half-moon or crescent; as, the lunulet on the wings of many insects.

Lunulite Lu"nu·lite noun [ Lunule + -life : confer French lunulithe. See Lunula .] (Paleon.) Any bryozoan of the genus Lunulites , having a more or less circular form.

Luny Lu"ny adjective [ Shortened from lunatic .] Crazy; mentally unsound. [ Written also loony .] [ Low, U.S.]

Lupercal Lu·per"cal adjective Of or pertaining to the Lupercalia.

Lupercal Lu·per"cal noun A grotto on the Palatine Hill sacred to Lupercus , the Lycean Pan.

Lupercalia Lu`per·ca"li·a noun plural [ Latin luperealis , from Lupercus the Lycean Pan, so called from lupus a wolf, because he kept off the wolves.] (Rom. Antiq.) A feast of the Romans in honor of Lupercus, or Pan.

Lupine Lu"pine noun [ Latin lupinus , lupinum , apparently from lupinus belonging to a wolf, from lupus a wolf; perhaps so called because it was supposed to exhaust the soil: confer French lupin . Confer Wolf .] (Botany) A leguminous plant of the genus Lupinus , especially Latin albus , the seeds of which have been used for food from ancient times. The common species of the Eastern United States is Latin perennis . There are many species in California.

Lupine Lu"pine adjective [ See Lupine , noun ] Wolfish; ravenous. Gauden.

Lupinin Lu"pin·in noun (Chemistry) A glucoside found in the seeds of several species of lupine, and extracted as a yellowish white crystalline substance.

Lupinine Lu"pin·ine noun (Chemistry) An alkaloid found in several species of lupine ( Lupinus luteus , Latin albus , etc.), and extracted as a bitter crystalline substance.

Lupulin Lu"pu·lin noun [ Confer French lupulin . See Lupuline .] 1. (Chemistry) A bitter principle extracted from hops.

2. The fine yellow resinous powder found upon the strobiles or fruit of hops, and containing this bitter principle. [ Written also lupuline .]

Lupuline Lu"pu·line noun [ New Latin lupulus the hop, from Latin lupus the hop: confer French lupuline .] (Chemistry) An alkaloid extracted from hops as a colorless volatile liquid.

Lupulinic Lu`pu·lin"ic adjective (Chemistry) Pertaining to, or obtained from, hops; specifically, designating an acid obtained by the decomposition of lupulin.

Lupus Lu"pus noun [ Latin , a wolf. See Wolf .] 1. (Medicine) A cutaneous disease occurring under two distinct forms.

» Lupus erythematosus is characterized by an eruption of red patches, which become incrusted, leaving superficial scars. Latin vulgaris is marked by the development of nodules which often ulcerate deeply and produce great deformity. Formerly the latter was often confounded with cancer, and some varieties of cancer were included under Lupus.

2. (Astron.) The Wolf, a constellation situated south of Scorpio.

Lurcation Lur·ca"tion noun [ See its Lurch .] Gluttony; gormandizing. [ Obsolete]

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