HET 



373 



HIB 



HETEROCLI'TAL, from trtfo;, different, 

 and ^X/vo-j, to incline, reversed. Applied 

 to shells whose spires turn in a contrary 

 direction to the usual way : sinistral. 



HET'EROC LITE .from irtgo:, different, and 

 xKiros, inclined, something anomalous. 

 The term is used by grammarians, c. to 

 designate words which deviate from the 

 ordinary forms of inflection, particularly 

 nouns which are irregular in declen 

 sion. 



HET'ERODOX, from tripos, different, and 

 ($a, opinion, different from the esta 

 Wished opinion. Not orthodox, hut con 

 trary to the faith and doctrines of the Es 

 tablished Church. 



HBTERoo'AMors (Or.), unequally mar 

 ried. In grasses, when the arrange- 

 ment of the sexes is different in different 

 spikelets from the same root. In compo 

 site plants, when the florets are of differ 

 ent sexes in the head. 



HETEROGE'XEOUS, fromirt^, different, 

 and yivo;, kind. Dissimilar in nature, not 

 homogeneous. Thus, heterogeneous nouns 

 have different genders in the singular aud 

 plural: heterogeneous words are such as 

 have different radical signs, &c. 



HETEROG'YNA, from inf{, different, and 

 yvvvi, a female. The name of a family of 

 hymenopterous insects, comprising those 

 of which the females differ from the 

 males, the one sex being winged, and the 

 other apterous, or of which the males and 

 females are winged, and the neuters apte- 

 rous, &c. See FORMICA. 



HETEROM'EROUS (Gr.), unequal legged, 

 i.e. when one leg has a different structure 

 from another. 



HETEEOP'ATHY, from Irtge?, different, 

 and irixSoj, affection. That mode of treat- 

 ing diseases, in which a morbid state of a 

 part is removed by inducing a different 

 morbid state. 



HETERop'oDA.from |rfr, different, and 

 irau;, a foot. An order of Mollusca, dis- 

 tinguished by their foot, which, instead of 

 forming a horizontal disc, is compressed 

 into a vertical muscular lamina, which 

 they use as a fin. Forskahl comprises 

 them all in his genus Pterotrachea. 



HETEROS'CII, IfromtTijoj, different, 



HETEKos'ctA.j;s, ) an d cxia, shadow. A 

 geographical designation for those inha- 

 bitants of the earth whose shadows at 

 noon project always the same way with 

 rosrard to themselves, or always contrary 

 ways with respect to each other. Such 

 are all who live within the tropics and 

 the polar circles. The shadows of those 

 who live north of the tropic of Cancer Tall 

 northward ; those of the inhabitants south 

 Of the tropic of Capricorn fall southward : 

 whereas the shadows of those who dwell 



between the tropics, fall sometimes to the 

 north and sometimes to the south. 



HETEROT'RopAL,Gr. fromirtfof, differ- 

 ent, andrgeira;, I turn. When the former 

 embryo of a seed lies across the latter, 

 neither pointing to its base nor apex. 



HEX'ACHORD, from ||, six, and %<>$* 

 a chord. 1. A term, in ancient music, for an 



imperfect chord, or a sixth. 2. Also an 



instrument of six chorus. 



HEXAE'DRON, ) from |, six, and ibeot, 



HEXAHE'DRON, ) abase. A solid figure 

 of six equal sides : a cube. 



HEx'AGOx,from ||, six, and <ytuviet, an 

 angle. A geometrical figure of six equal 

 sides, and as many equal angles. 



HEXAGYN'IA, from ||, six, and ywv., 

 a female. An order of plants in the 

 sexual system of Linnasus, having six 

 pistils. 



HEXAM'ETER, from j|, six, and /j.tT%tn, 

 measure A poetic verse having six feet. 



HEXAN'DRIA, from |jj, six, and ctv/if, 

 a male. A class of plants in the Linnsan 

 sexual system, having hermaphrodite 

 flowers furnished with six stamens of 

 equal length. 



HEXAN'GULAR, six-angled. Having six 

 equal angles. 



HEX'APED, ) from (, six, and trevf, a 



HEX'APOD, j foot. An animal with six 

 feet. 



HEXAPET'ALOUS, Lat. herapetahts, six- 

 petalled A corolla consisting of six 

 petals. 



HEXAPHYL'LOCS, Lat. hexaphyllus, six- 

 leaved. 



HEX'APLA, jg, six, and a?rAw, I open. 

 The combination of six versions of the 

 Old Testament, by Origen, 



HEX'ASTYLE, from i{, six, and rrv^es, 

 a column. A building with six columns 

 in front. 



HiATEi/EA,a genus of Mollusca, family 

 Tnchtsa, order Acephala testacea, Cuv. The 

 name is a diminutive of hiatus, an aper- 

 ture ; the shell having an aperture near 

 the middle of its edges, to allow the pas- 

 sage of the foot. The species are found in 

 sand, among zoophytes, &c. 



HIA'TUS (Latin), an aperture, chasm, or 

 gap. Applied to verses where one word ends 

 with a vowel, and the next word begins 

 with one, and thereby occasions the mouth 

 to be more opened, and the sound to be 

 harsh. The term is also used in speaking 

 of MSS., to denote their defects, or parts 

 which have been defaced. 



HIBER'KACLE, Lat. hibernantla, -winter- 

 quarters. The bulb or bud of a plant, in 

 which the embryo is inclosed by a scaly 

 covering, and protected from injury dur- 

 ing tho winter, is called the hibernacle o 

 the plant. The term is also used to de- 

 signate the winter-lodge of a wild animal. 



