GLOSSARY. 



77 



formed at the sun's centre by the 

 projection of the radius vector of a 

 planet on the ecliptic with a line 

 drawn from the sun's centre to the 

 first point of Aries. 



Heliographlc (Gr. 7^.10 y, helios, the 

 sun ; 7pa$o>, grapho, I write). 

 Delineated by the rays of the sun. 



He'liolites (Gr. '//Atos, helios, the sun ; 

 \i6os, lith'os, a stone). A genus 

 of fossil corals, distinguished by 

 the central radiating or sun-like 

 aspect of the pores. 



Heliom'eter (Gr. T^UOS,' helios, the 

 sun ; fj.fr pov, metron, a measure). 

 An instrument for measuring the 

 diameter of the heavenly bodies. 



Helioscope (Gr. faios, helios, the 

 suii ; (TKoireca, skop'eo, I view). A 

 telescope fitted for viewing the sun 

 without injury to the eyes. 



He'liostat (Gr. ^Atos, helios, the sun; 

 laTr]/j.i, kistcmi, I make to stand). 

 An instrument for fixing (as it 

 were) a sunbeam in an horizontal 

 position. 



Helisphe'rical(Gr. eAj|, helix, aspire; 

 o-Qcupa, sphaira, a sphere). Ap- 

 plied to a course in navigation, 

 which winds spirally round the 

 globe. 



Helix (Gr. 4Ai|, helix, from e\i<rffca, 

 helisso, I turn round). A spiral 

 line or winding ; the cartilaginous 

 structure forming the external rim 

 of the ear. 



Hellenic (Gr. 'EAAijj/, Hellen, a 

 Greek). Belonging to the Hellenes 

 or inhabitants of Greece. 



Hellenism (Gr. 'EAArjj/, Hellen, a 

 Greek). The Grecian idiom used 

 by the Jews living in countries 

 where Greek was spoken. 



Helminth 'agogue (Gr. i\/^^s, hel- 

 mins, a worm ; byca, ago, I drive). 

 Removing or expelling intestinal 

 worms. 



Helmin'thoid (Gr. e\fj.tvs, helmins, a 

 worm ; eldos, shape). Like a worm. 



Hema- or Hemat-. For words with 

 this beginning, see the same words 

 commencing with Haema- or 

 Hannat-. 



Hemeralo'pia (Gr. fofpa, hemera, 

 day ; dAo/xat, ala'omai, I grope 



about ; &$, ops, the eye). A de- 

 fect of sight, in which the patients 

 can see by night, but not by day. 



Hemicra'nia (Gr. IHUVVS, liemisus, 

 half; ttpaviov, kra'nion, the skull). 

 A painful affection of one side of 

 the head and face. 



Hemihed'ral (Gr. rj/j.urvs, hemisus, 

 half; eSpa, hedra, a side). Half- 

 sided ; a form assumed by crystals 

 from the excessive growth of some 

 of their sides and the obliteration 

 of others, so that they have only 

 half the number of faces required 

 by the laws of symmetry. 



Hemily'tra (Gr. V/ULHTVS, hemisus, 

 half ; e\vrpoi>, eluftron, a cover). 

 Wing in insects, of which one half 

 is firm, like an elytruui, and the 

 other membranous. 



Hemio'pia (Gr. -rj/j-Krvs, hemisus, 

 half ; wi|/, ops, the eye). A defect 

 of sight in which only half of an 

 object is seen. 



Hemiple'gia (Gr. r^io-vs, hemisus, 

 half; TrXTjao'ct), plesso, I strike). 

 Loss of power in one lateral half 

 of the body. 



Hemip'tera (Gr. r)/j.i<rvs, Jiemisus, 

 half ; iTTfpov, pteron, a wing). An 

 order of insects which have the 

 upper wings half hard and half 

 membraneous ; as the cock-roach 

 and grasshopper. 



Hemisphere (Gr. wicrvs, hemisus, 

 half ; <r<patpa, spliaira, a round 

 body). A half sphere ; the half of 

 the earth, divided by the equator ; 

 a map of half the globe ; in 

 anatomy, applied to each lateral 

 half of the brain. 



Hemispherical (Gr. fi/jucrvs, heimsiis, 

 half; (rcpaipa, sphaira, a round 

 body). Having the shape of half 

 a globe. 



He'mitrope (Gr. y^to-vs, hemisus, half; 

 rpeTTu, trep'o, I turn). Half turned. 



Hemop'tysis. See Hfemop'tysis. 



Hem'orrhage. See Hsem'orrhage. 



Hendec'agon (Gr. e^Se/ca, hen'deTca, 

 eleven ; yuvia, gonia, an angle). 

 A figure of eleven sides and as 

 many angles. 



Hepatic (Gr. rjirap, hepar, the liver). 

 Belonging to the liver ; applied to 



