GASTKIMARGUS 



141 



GEMMA 



Gastrimargus, (gas-tri-mar'gus)=Lagothrix : 

 an American monkey. 



Gastrobranchus, (gas-tro-brang'kus). [Gaster 

 and Branchiae, q r.]=Myrine: also called 

 Borer, q.v., and Glutinous Hag; a fish be- 

 longing to Myxinidae. 



Gastrophysaria, (gas-tro-fi-sa'ri-a). [Gaster, 

 q.v.; Gk. physa, breath)=Annelidaria : De 

 Blainville's term for Sipunculus, &c. 

 Gauge, (gaj). [Jauge, the French word.] 1. 

 A measure: a standard of measurement. 2. 

 Size, especially of a cylinder, such as the bore 

 of a gun. Narrow G , of railway, 4ft. 8J in. 

 between the internal edges of the rails. 

 Broad G., 7 ft. between the rails. 

 Gauging, (gaj ing). Measuring by reference 

 to a standard gauge- especially used for the 

 estimation of the volume of casks, <fec. 

 Gault, (gawlt). The lowest of the Upper 

 Cretaceous beds: a clayey rock between the 

 Upper and Lower Greensands. 

 Gaultherates, ( gawl'ter-ats ). Salts of Gaul- 



theric acid. 



Gaultheria, ( gawl-te ri-a ). [ Mr. Gaulthier. ] 

 A plant belonging to Ericaceae. 

 Gaultheric acid,(gawl'ter-ik). [Gaultheria,5.i'.] 

 =C 8 H3O 3 : a fragrant oil obtained from the 

 flowers of Gaultheria procumbens. Also called 

 Oil of Winter-green and MethyJ-salicylate. 

 Gavial, (ga'vi-al). [Gavial, the Hindoo name.] 

 A fresh-water crocodile, found in East Indian 

 rivers. Fossil remains of G. found in Middle 

 Eocene rocks. 



Gay Lussac's barometer. A modification of 

 the siphon barometer, invented by Gay 

 Lussac, a French chemist. 

 Gay lussite, (ga-lu'sit). [M. Gay Lussac.] A 

 mineral, chiefly hydrated carbonate of soda 

 and lime. 



Gazelle, (ga-zel'). [The French name.]= 

 Gazella=Antelope dor- 

 cus. v. Antelope. 

 Gazoline, ( gaz'o-lin ). 

 [Gas, q.v.] A mineral 

 hydrocarbon, obtained 

 from petroleum. 

 Gear,(gei). [A.-S. geara, 

 furniture.] Machinery: 

 especially smaller por- 

 tions intended to com- 

 municate motion be- 

 tween principal parts. 

 Gearing.(ggr'ing). [Gear, 

 q.v. ]=Gear, q.v. 

 Gecarcinus, (je-kar'si-nus). 

 karkinos, crab.]=Land 

 crab of West Indies: au 

 animal belonging to 

 Brachyura, capable of 

 both aerial and aquatic 

 respiration ; migrates 

 to sea to lay its eggs. 

 Gecko, (gek'o). [From 

 its sound. ] = Gecko 

 verus = Hemidactylus 

 maculatus, and many 

 others: a small lizard, 

 easily domesticated, 

 found in Ceylon. 



Geckotidae, (ge-kot'i-dS). [Gecko, *q.v.] A 

 family of lizards, of which the Gecko is the 

 type. 



Gedge's alloy. A compound of copper, iron, 

 and zinc, named aftoi- its inventor; used for 

 covering the bottoms of ships. 



Gedrite, (ged'rit). [Gedre, in Spain.] A 

 mineral, chiefly silicate of iron, magnesium, 

 and aluminum. 



Geese, (ges). [Plural of goose. ]= Anserine: 

 aquatic birds belonging to Natatores. Pro- 

 bably all descended from Anas ferus=Grey 

 lag goose. 



Gehlenite, (geh'le-nlt). [Herr Gehlen.] A 

 mineral, chiefly silicate of alumina and 

 lime. 



Geic acid, (ge'ik). [Gk. ge, the earth.]= 

 C 2 oH ]2 O 7 : one of the constituents of the 

 mould of decaying wood. 



Gein, (ge'in). [Gk. ye, the earth. ]=Humus: 

 decaying woody matter 



Geisers, (gi'zer). [The Icelandic name.]= 

 Geysers, q.v. 



Geissler's tubes, (gi'sler), glass tubes contain- 

 ing rarefied gas, which glow brilliantly when 

 the secondary currents of an induction coil are 

 passed through them, each gas having a dis- 

 tinctive colou r. G. machine : a modification 

 ot the Torricelian vacuum applied as an air- 

 pump. 



Gelasimus, (je-las'i-mus). [Gk. gelasimos, 

 ludicrous.] = Fighting crab : a crab-like 

 animal found in Borneo, &c One species 

 has a claw larger than its body. 



Gelatigenous, (jel-a-tij'en-us). [Gelatin, q.v.; 

 Gk. genno.o, I produce.] Capable of produc- 

 ing gelatin. G, substances: gelatin, chou- 

 driri, ossem, &c. 



Gelatin, (jel'a-tin). [Gelatine, the French 

 word.]=C]3HjoN20g: glue, size, isinglass, 

 &c: a compound found only in animal sub- 

 stances. 



Gelder-rose, (gel'der). [Corruption of Guel- 

 dres.] = Viburnum opulus : a shrub; also 

 called snow-ball tree, belonging to Capri- 

 foliacese. 



Gelidium, (jel-id'i-um). An edible sea- weed, 

 belonging to Fucacese. 



Gelocus : an extinct Mammalian animal, 

 known by fossil remains. 



Gem, (J em )- [Gemma, the Latin word.] 

 Singular of gems, q. v. 



Gemelli muscles, (je-mel'li). \L. gemel- 

 lus, paired.] Two small muscles in the 



thigh. 

 Gemini, (jem'i-ni). [L. gemini, twins.]=The 



Twins : the third x-N* 2 ^-^ 



sign of the Zodiac, ^^{v vJ-^>^ II 



containing the stars 



Castor and Pollux. 

 Geminorum, (jem-in- 



6'rum). . [The Latin 



word. J = Of the 



Twins: belonging to 



the constellation of 



that name. Gemini. 



Gemitores, (jem-i-to'res). A family of birds 



belonging to Columbidse. 

 Gemma, (jem'ma). [The Latin word.] 1. 



