HEMIDOME 



162 



HERE 



Hemidome, (hem'i-dom). [Hemi and Dome, 

 q.v.] In mineralogy: formed by the planes 

 parallel to the ortho-diagonal. 



Hemihedral, (hem-i-hu'dral). [Hemi, q.v. ; 

 Gk. hedra, seat.] Used of crystals having 

 but half the normal number of planes; also 

 generally for crystals in which some of the 

 faces are absent. 



Hemimellitic acid = C 9 H 6 6 . v. Mellitio 

 acid. 



Hemimetabola, (hem-i-me-tab'o-la). [Hemi, 

 q.v. ; Gk. metabole, change.] Insects having 

 three stages of metamorphosis, with but 

 small differences between them: includes 

 Hemiptera, Orthoptera, and Nearoptera. 

 cf. Holometabola. 



Hemimetabolic, (hem-i-me-tab'o-lik). [Gk. 

 hemi, half; mfto.bole, change.] Undergoing 

 only a partial metamorphosis. 



Hemimorphite, (hem-i-morfit)=Smithsonite, 



i-i-op'si-a). [Hemi, q.v.; Gk. 

 ops, eye.]=Hemiopia : half blindness, v. 

 Optic. 



Hemipinic acid, CxoHioOg: a combustible 

 crystalline substance, obtained by the com- 

 bination of opianic acid and oxygen. 



Hemiptera, (hem-ip'ter-a). [Gk. hemi, half; 

 pteron, wing.] Bugs, lice, cochineal insects, 

 &c.: insects whose anterior wings are half 

 coriaceous, v. Insects. 



Hemispheres, (hem'is-fSrz). [Gk. hemi, half ; 

 spliaira, sphere.] Cerebral H.; the two late- 

 ral halves in which the brain is divided. 

 Magdeburg //..- two hemispherical brass 

 vessels made to fit together air-tight. When 

 the air is pumped out from within, tho 

 pressure of the external air keeps the two 

 together. 



Hemitone, (hem'i-ton). [HemiandTone, q.v.] 

 An interval in musio. 



Hemitrope, (hem'i-trop). [Hemi, q.v.; Gk. 

 trope, turning.] A half turning. 



Hemlock, (hem'lok). [ffemleac, tho A.-S. 

 iiame.]=Conium maculatum: an herb be- 

 longing to Apiaceae. Water II. =Cicuta. 77. 

 spruce fir Abies Canadensis. 



Hemp, (hemp). [Hcenep, the A.-S. word.]= 

 =Cannabis sativa. q.v. : a plant the type of 

 Cannabinaceae. H. aflrrim0y=Eupatorium, 

 q.v. H. neMe=Galeopsis, q.v. H. worts= 

 Cannabinacese, q.v. Manilla H. = Musa 

 textilis, q.v. 



Hempstead beds, (hemp'sted). [H., in the Isle 

 of Wight.] Maiine and fresh -water beds: 

 one of the British representatives of Lower 

 Miocene strata. 



Hen, (hen). [The A.-S. word.] 1. The female 

 of Gallus domesticus. 2. Used generally for 

 any female bird. H. harrier=Falco cyaneus. 

 Water H.=Moor 77.=Gallinula chloropus. 

 H. tt>ed=Guinea-hen weed, q.v. 



Henbane, (heri'biiu). [Hen, q.v.; A.-S. bana, 

 poison.] Hyoscyamusniger: a poisonous herb 

 belonging to Boragiuaceae. 



Hendecagon, (hen-dek'a-gon). [Gk. hendeka, 

 eleven ; gonia, angle. ] A figure having eleven 

 angles; usually a plane regular figure having 

 eleven equal sides, 



Henfrey's classification of plants. 



Phanerogainia or flowering plants 

 Angiospermia 



Dicotyledons. 

 Monocotyledons. 

 Gymnospermia 



Cryptogamia or flowerless plants 

 Augiosporse. 

 Gymnosporaa. 

 Henle, tubes of. In the kidney: named after 



the discoverer. 

 Henley's electrometer=Quadrant electrome- 



ter, q.v. 

 Henna, (hen'na), [Hinna, the Arabic name. ] 



=Lawsonia spinosa: from the leaves of which 



a paste is made, used for colouring the finger 



nails, &c. 

 Hensloviacece, (hen-slo-vi-ii'se-e). [Henslovia, 



the only genus, named after Professor Hen- 



slow.] East Indian trees resembling Myro- 



balans. 

 Hepatic, (he-pat'ik). [Gk. hepar, liver.] Be- 



longing to or connected with tho liver. //. 



artery: which conveys blood from the heart 



to the liver. H. vein: conveys blood from 



the liver to the heart by way of tho vend 



cava inferior. H. duct: conveys tho gall 



from the liver. 

 Hepatic, (he-pat'i-se). [Gk. hepar, liver.] 



=Liver-worts: mosses, the leaves of which 



are merely plates of cells, v. Mosses. 

 Hepatite, (hep'a-tit). A variety of Earito or 



Baryta. 

 Heptagon, (hep'ta-gon). [Gk. Tiepta, seven; 



gonia,, corner.] A figure with 



seven angles: usually a regular 



plane figure with soveu equal 



sides. 

 Heptane, (hep'tan). [Hepty- 



lene, q.v.] C7Hjg=Septane= 



Hoptyl hydride : a hydro- 



carbon. Heptagon. 



Heptine, (hep'tin). [Heptylene, q.v.] C 7 H 14 



=Septine, q.v. 

 Heptyl, (hep'til). [Heptylic, q.v.] The radicle 



of the heptylic series. //. aZco/io/=(Enanthyl 



C 7 H 1? . 

 Heptylamine, (hep-tira-mm). [Heptyl and 



Amine, q.v.] CrMtfN: ammonia in which ono 



equivalent of H is replaced by one of heptyl. 

 Heptylene, (hep'ti-len). [Gk. hepta, seven: 



from the seven equivalents of carbon. ]= 



C7Hi4=Qj]nanthyleue: a hydrocarbon of tho 



define sei'ies. 

 Heptylic acid, (hep'ti-lik). [Heptylene, q.v.] 



C7Hi40o=Q3nanthylic acid, q.v. 

 Heracleum, (he-rak'le-uni). [Heracleon, a 



plant sacred to Hercules .]= Cow parsnip, hog- 



weed, &c.: a large herb belonging toApiacese. 

 Herald-moth=Gonopteryx libatrix : named 



from heralding winter. 



Herb, (erb). [Herba, the Latin word.] A 

 plant of small size, usually an annual, v. 

 Plants. H. JBennett=Genm, q.v. H. Chris- 



topker=Acts&a. spicata: an herb belonging to 

 Rammculaceae. H. du rfia6Ze=Plumbago 

 scandens. H. (re?YirtZ=/Egopodium podo- 

 garia: a plant belonging to Apiaceae. //. 



