MACLUREITE 



206 



MAGNESIAN 



M. araniiaca=Osage-orange M. tinctura 



= Fustic, v. Morus. 

 Maclureite, (mak-lu'rit). [W. Maclnre of 



America.]=Chondrodite: a mineral, chiefly 



silicate of magnesia. 

 Maclurin, ( mak'lu-rin ). [Maclura, q.v.]= 



Ci 3 H 10 O 6 = Morintannic acid ; found in 



fustic. 

 Macrauchenia, (mak-raw-ke'ni-a). [Gk. mak- 



ros, long; auchen, neck.] Lama-like animals, 



belonging to Pachydermata, known only by 



fossil remains. 

 Macro, (mak'ro). [Gk. makros, long.]=Large: 



a prefix implying great size. 

 Macrocercus, (mak-ro-ser'kus). [Gk. makros, 



long; kerkos, taiL] = Macaw: an American 



parrot-like bird. 

 Macrocystis, (mak-ro-sis'tis). [Gk. makros, 



long; kystis, bladder.] Plants belonging to 



the stems are small, and the 

 thread-like fronds are several hundred feet 

 in length, and have large air-bladders at 

 the ends. 



Macrodactyli, (mak-io-dak'ti-li). [Gk. mak- 

 ros, long; daktylos, finger.] A division of 

 Grallatores, including the coot, rail, &c.; 

 birds having long toes. 



Macroglossa, (mak-ro-glos'sa). [Gk. makros, 

 long; glossa, tongue.] 1. A bat, found in 

 Java, having a long head and extensile 

 tongue. 2. A hawk-moth; v. Sphingidae. 

 M. titan = Humming-bird hawk-moth: a 

 moth greatly resembling the humming- 

 bird. 



Macropodidse, (mak-ro-pod'i-de). [Macropus, 

 q.v.] 1,= Kangaroos: a sub-division of Mar- 

 supialia. 2. Spider-crabs, sea-spiders, &c. : 

 crustacean animals belonging to Decapoda. 



Macropterna, (mak-rop-ter'na). [Gk. macros, 

 long; pterna, heeled.] A frog-like animal, 

 known only by fossil tracks, v. Lithich- 

 nozoa. 



Macropus, (rnak'ro-pus). [Gk. makros, long; 

 pous, foot. ]= Kangaroo: an Australian herbi- 

 vorous animal belonging to Marsupialia, 

 q.v. 



Macrorhynus, (makro-ri'nus). [Gk. makros, 

 long; rin, nose.] = Sea-lion, elephant, seal, 

 &c. : a sub-division of Phocidae. 



Macrorhynchus, (mak-ro-rink'us). [Gk. mak- 

 ros, long; rhygkos, snout.] A crocodile-like 

 animal, known only by fossil remains. 



Macroscelicles, (inak-ro-sel'i-dez). [Gk. mak- 

 ros, long.] African jumping-shrew = Ele- 

 phant shrew : an animal belonging to 

 Insectivora. v. Shrew. 



Macroural, ( mak-ru'ral ) [Macrura, q.v.]= 

 Shrimp-like: having a long tail. 



Macrotherium, (mak-ro-the'ri-um). [Gk. mak- 

 ros, long; therion, beast.] A large animal, 

 belonging to Edentata, known only by a few 

 fossil remains, found in Miocene rocks. 



Macrura, (mak-ru'ra). [Gk. makros, long; 

 oura, tail.] Lobster, shrimp, &c.: decapod 

 crustaceans with long tails. 



Macula lutea, (mak'u-la lu'te-a). [L. macula, 

 spot; luteus, yellow.]= Yellow-spot: a small 

 depression at the centre of the back of the 

 eye, 



Maculae, (mak'u-le). [L. macula, spot.] Spots: 

 especially dark spots on the sun, &c. cf. 

 Faculaa 



Madder, (mad'der). [ Madder e, the A.-S. 

 name.] 1. =Rubia tinctoria: a plant belong- 

 ing to Galiaceae. 2. A red colouring matter, 

 obtained from Bubia, used as a dye. M.- 



Madrepora, (mad-re-p5'ra). [Madrepore, the 

 French name.] A coral polyp budding into 

 a tree-like form. 



Madreporic , (mad-re-po'rik). [Madrepore, q. v. ] 

 Resembling, or related to, Madrepora. M. 

 plate: a rounded calcareous mass on the 

 dorsal surface of a star-fish. M. canals: 

 connecting the ambulacral system of star- 

 fishes with the openings in the surface. 



Madreporidae, (mad-re-po'ri-de). [Madrepora, 

 q.v.; Gk. eidos, form.] A sub-division of 

 Coral-polyps or Anthozoa. 



Mad-wort=Asperngo, q.v. 



Msenura, (me-ntt'ra) Lyre-bird: a pheasant- 

 like bird, having very large tail feathers 

 resembling a lyre in form. 



Maastricht beds, (ma'strikt). [M. in Holland.] 

 Calcareous strata, belonging to the Upper 

 Cretaceous system, in which are found re- 

 mains of Mosasaurus. 



Magdeburg hemispheres, Two hollow hemi- 

 spheres, usually of brass, which are kept 

 together by the external pressure of the air, 

 when the air within is pumped out: used to 

 illustrate the pressure of the air. 



Magellanic clouds, ( mag-el-lan'ik ). [Senor 

 Magalhaens.] Oval nebulous patches in the 

 southern heavens = Nubecula major and 

 minor: resolvable by the telescope into a 

 vast number of faint stars. 



Magenta, (ma-jen'ta). [M. in Italy.] Co H 19 

 NsHgO: a rose-coloured dye obtained "from 

 aniline. 



Magic lantern. A closed box containing a 

 light which passes out at 

 one opening only, and 

 forms, when converged by 

 a lens, on a screen i n front, 

 an image of any trans- 

 parent picture placed be- 

 fore the opening. 



Magistery of Bismuth, 

 (maj'is-ter-i). [Magistral, 

 g.?>.J=Subnitrate of Bi. Magic Lantern. 



Magistral, (maj'is-tral). [~L.magister, master.] 

 A compound of copper pyrites, sulphate of 

 iron, &c., used in amalgamation, to assist 

 the process. 



Magnesia, (mag-ne'si-a). [Magnesia, where 

 first found.]=MgO=Oxide of Magnesium: 

 a white alkaline powder: one of the 

 alkaline earths. M. group of minerals: 

 includes Brucite, magnesia, &c. Borate of 

 M. =Boracite. Carbonate ofM. =Magnesite. 

 Chloride of M. = Wagnerite. Fluosilicate. of 

 M. =Chondrodite. Hydrate of M. Brucite. 

 M. attTO=Pickeringite. 



Magnesian metals, (mag-ne'si-an). [Magnesia, 

 q.v.} Dyad metals, which burn readily when 

 much heated. M. limest<me=Do\omitv = 

 Permian, q.v. M. 



