HIS 



199 



HOM 



the Order of Annelida including 

 the Leeches. 



hispid, a., hisp'-td (L. hisptdus, 

 bristly, rugged), rough ; covered 

 with strong hairs or bristles. 



histioid, a., his'ti-oyd (Gr. histos, 

 a web, a tissue ; eidos, resem- 

 blance), in anat., tissue-like. 



histogenesis, n., hfe'-td'j8n'>&s-is, 

 also histogeny, n., his-ttidf-Zn-i 

 (Gr. histos, a web, a tissue ; 

 genndo, I produce), the origin 

 or formation of organic tissue : 

 histogenetic, a., hig<tG'fen',$tftic, 

 promoting the formation of 

 organic textures ; in bot., applied 

 to minute molecules supposed to 

 be concerned in the formation of 

 cells. 



histology, n., hte-t8l'-#-jt (Gr. 

 histos, a web or tissue ; logos, 

 discourse), the study of the tissues 

 of the body, especially its min- 

 uter elements ; the study of 

 microscopic tissues in animals or 

 plants : histological, a., his' to- 

 lodj'ik-dl, relating to the descrip- 

 tion of minute tissues in animals 

 or plants. 



histolysis, n., his-tdl'-is-is (Gr. 

 histos, a web or tissue ; lusis, a 

 solution from lud, I dissolve), 

 the disintegration of previously 

 organized structures : histolytic, 

 a., his'to-lit'ik, derived from the 

 disintegration of previously 

 organized structures ; of the 

 nature of histolysis. 



hives, n. plu., hivz (as supposed 

 to be shaped something like a 

 beehive; may be a corruption of 

 heave, to raise), variously applied 

 to skin diseases among children, 

 consisting of vesicles scattered 

 over the body ; a popular name 

 for chicken-pox. 



holly, n., IMll (AS. holegn], an 

 evergreen shrub having prickly 

 leaves, and producing red berries ; 

 the leaves and bark said to 

 possess tonic and febrifuge prop- 

 erties, while the berries are emetic 

 and purgative ; the wood is 



esteemed in turnery, etc., and 

 the bark furnishes bird - lime ; 

 systematic name, Ilex aquifol- 

 ium, Ord. Aquifoliacese. 



hollyhock, n., hMli-hdk (holly, a 

 corruption of holy, as supposed to 

 have been brought from the Holy 

 Land ; AS. hoc, W. hocys, 

 mallows), a tall, beautiful garden 

 flowering plant, employed medic- 

 inally in Greece, yields fibres 

 and a blue dye; the Althaea rosea, 

 Ord. Malvaceae. 



Holocephali, n. plu., hWo-sZf.ali 

 (Gr. holos, whole ; kephale, the 

 head), in zool. , a Sub-order of tho 

 Elasmobranchii, comprising the 

 Chimserse. 



holometabolic, a., hdl'd-met-a- 

 bol'-ik (Gr. holos, whole; metdbdle, 

 change), applied to insects which 

 undergo a complete metamorph- 

 osis. 



holosericeous, a., htil'd-ser-zsh'-'tis 

 (Gr. holos, whole ; serikos, L. 

 sericus, silky), covered with 

 minute silky hairs, best discovered 

 by touch. 



Holostomata, n. plu., hdl'-ti-stdml 

 dt'd (Gr. holos, whole ; stdma, a 

 mouth, stomata, mouths), a div- 

 ision of gasteropodous molluscs 

 in which the aperture of the 

 shell is rounded or entire. 



Holothuroidea, n. plu., hol'-d- 

 thur-oj/d'e-d (Gr. holothourion, 

 a zoophyte resembling a sponge ; 

 eidos, resemblance), an Order of 

 Echinodermata, comprising the 

 Trepan gs. 



Homaliacese, n. plu., hdm-dl't-d'- 

 sZ-e, also Homaliads, n. plu., 

 hom-dl'i-ddz (Gr. homalos, 

 uniform, regular), the Homalia 

 family, an Order of tropical trees 

 and shrubs bearing flowers in 

 spikes or racemes : Homalium, 

 n., hdm-dl'-i-ttm, a genus, so 

 called because their stamens are 

 regularly divided into three 

 stamened fascicles. 



homocarpous, a., htim'-o-kdrp'-us 

 (Gr. homos, alike ; karpos, fruit), 



