IABYRINTHIC 



191 



UEVOGYRATION 



of ear: communicates with the brain by the 

 auditory nerves. 



Labyrinthic teeth, (lab-i-rin'thik). [Laby- 

 rinth, q.v.] Having many radiating vertical 

 grooves. 



Labyrinthodon, (lab-i-rin'tho-don). [Gk. 

 labyrinthos, labyrinth; odous, tooth.] A 

 large animal, belonging to Amphibia, re- 

 mains of which are found in Upper Trias: 

 previously named Mastodonsaurus and 

 Phytpsaurus. The type of Labyrinthodonta. 



Labyrinthodonta, ( lab - i - ri n - tho - don ' ta ). 

 [Labyrinthodon, q.v,] Extinct amphibious 

 animals, with weak limbs, long tails, and 

 labyrinthic teeth, q.v., known by footprints 

 in Coal Measures. 



Labyrinthulsa, (lab-i-rin'thu-le). [Labyrinth, 

 <7.v.]=Tram-weavers: a sub-division of Pro- 

 tista, q.v. 



Lac, (lak). [Lak, the Persian word.] 1. A 

 resin obtained from fig and other trees, 

 caused by the insect Coccus laccse piercing 

 the branches to deposit its eggs : occurs in 

 forms of shell-lac, seed-lac, and stick-lac ; 

 the chief constituent of sealing-wax and 

 of lacquer. 2. A hundred-thousand, used 

 chiefly of rupees. L. dye': obtained from a 

 species of the Coccus insect, used as a red dye. 



Xace, (las). [L. laqueus, noose]. A woven 

 fabric of thread, silk, gold or silver wire, 

 &c. L. ^Kes=Insects belonging to Neurop- 

 tera. L. bark = Inner bark of Lagetta 

 lintearia. L. winged JZies=Hemerobius, be- 

 longing to Neuroptera. L. ZtzarcJ=Hydro- 

 saurus: a Bornean lizard about 6 feet long. 

 Indian L. tree=Lagetta lintearia. 



Lacerta, (la-ser'ta). [The Latin name.] 1. 

 Lizard: a reptile belonging to Lacertitia. 

 2. The Lizard: a small northern constellation 

 of small stars, formed in the seventeenth 

 century. L. agilis=Sa.nd lizard. L. croco- 

 dilus=Crocodile, q.v. L. gecko=Gecko, q.v. 

 L. ^/Hcana=Chaineleon, q.v. L. gigantea 

 r=Geosaurus. g.v. 



Lacertilia, ( la-ser-til'i-a ). [Lacerta, q.v.~\= 

 Lizards, chameleon, &c. '. a sub-division of 

 Reptilia, of which the males are usually 

 larger than the females. 



Lachesis, (lak'e-sis). [Classical.] No. 120 of 

 the Minor Planets^ discovered in 1872. 



Lachrymal, (lak'ri-mal). [L. lacrima, tear.] 

 L. 6ones=Ungual bones, q.v. L. gland: in 

 the eye, secreting a watery fluid between 

 the eyeball and the eyelid, which fluid is 

 carried away by the lachrymal duct: not 

 found in fishes and cetaceans. L. nerve : a 

 sub-division of the ophthalmic branch of the 

 fifth nerve, v. Nerves. L. sinws=Suborbi- 

 tal sinus: a large cutaneous follicle beneath 

 the eye, open externally, but closed within. 

 Especially developed in antelopes. 



Lacistemacese, (la - sis - te - m a'se - e)=Laciste- 

 mads: trees and shrubs, with apetalous 

 axillary flowers, belonging to Violales. 



Lacquer, (lak'er). [F. laque, lac.] A solution 

 of shell-lac in alcohol. 



Lacquering, ( lak'er-ing ). [Lacquer, q.v. ] 

 Covering with a compound of lac, turpen- 

 tine, and alcohol. 



Lactamic acid, (lak'ta-mik). [Lactamide, q.v.] 

 CgH^NOs: a compound of lactic anhydride 

 and ammonia. Alanin, q.v. 



Lactamide, (lak'ta-mid). [Lactio and Amide, 

 q.v.] = CgH7N02 : a compound of lactic 

 anhydride and ammonia. 



Lactation, (lac-ta'shun). [L. lac, milk.] The 

 act or period of giving milk in Mammalian 

 animals. 



Lactates, (lak'tats). [Lactic, q. v.] Compounds 

 of lactic acid with bases. 



Lacteals, (lak'te-alz). [L. lac, milk.]:= Lym- 

 phatic capillaries of the small intestines, 

 which convey the milky chyle to the thoracic 

 duct, found only in vertebrate animals, v. 

 Lymphatic system. 



Lacteal animals, (lak'te-al). [L. lac, milk.] 

 Oken's term for Acalephse. 



Lactic, (lak'tic). [L. lac, milk,] L. acid= 

 CgHgOs: found in sour milk; a syrupy acid 

 liquid, belonging to the glycolic series of 

 acids. L. anhydride = C 3 H 4 2 : obtained 

 from lactic acid. L. /mjientai<m=Fermen- 

 tation resulting in lactic acid, as in the 

 conversion of sugar of milk and grape 

 sugar into lactic acid. L. series of acids=; 

 CnEkjnOs: a series, of which lactic acid is 

 the type. 



Lactide, (lak'tid). [Lactic, 9.v.]=C 3 H 4 3 

 =Lactic anhydride : a white crystalline sub- 

 stance, obtained from lactic acid. 



Lactin, (lak'tin). [L. lac, milk.]=Sugar of 

 milk=Lactose, q.v. 



Lactometer, (lak-tom'e-ter). [L. lac, milk; 

 Gk. metron, measure.] An instrument for 

 determining the quality of milk by means 

 of its density. 



Lactone, (lak'ton). [L. lac, milk.]=3C 5 H 8 2 : 

 a volatile liquid obtained during the dis- 

 tillation of lactic acid. 



Lactose, (lak'tos). [L. lac, milk.]=Ci 2 H 22 On 

 H 2 0=Sugar of milk: a crystalline variety of 

 sugar obtained from milk. 



Lactous, (lak'tus). [L. lac, milk.] L.fermen- 

 taiion=Lactic fermentation, q.v. 



Lactuca, (lak-tu'ka). [The Latin name.]= 

 Lettuce: an herb, with milky juice, belong- 

 ing to Asteraceee. 



Lactyl, (lak'til). [L. lac, milk.]=C 3 H 4 O: the 

 radicle of the lactic series. 



Lacustrine, (la-kus'trln). [L. locus, lake.] 

 Belonging to a lake. L. formations: formed 

 at the bottom of lakes. 



Lady, L. 6ird=Coccinella, q.v. L.'s mantle 

 =Alchemilla, q.v. L.'s slipper = Cypri- 

 pedium: a plant belonging to Orchidacepe. 

 L.'s sm0cfc=Cardainine pratensis : an herb 

 belonging to Brassicaceae. L.'s tresses=. 

 Spiranthes autumnalis. L. fish=Silla.go 

 domina. L. /ern=Aspidium filix-foemina. 



Lsemodipoda, (le-mo-dip'o-da). [Gk. laimos, 

 throat; dis, twice; pous, foot.] Crustacean 

 animals, with two legs under the throat, 

 belonging to Edriophthalmia. 



Lsevo, (le'vo). [L. Icevus, on the left.] Left, 

 handed. 



Laevogyration, (IS-vo-ji-ra'shun). [ L. Icevo^ 

 loft; gyrus, circle.] = Polarization to the. 

 left hand. 



