EPI 



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EQU 



epistaxis, n., ep'-is-taks'-is (Gr. 

 epistazo, I cause to drop or 

 trickle down, epistaxo, I shall 

 cause to drop down from epi, 

 upon ; stazo, I drop), haemor- 

 rhage or bleeding from the nose. 



episterna, n., ^p'-i-stern'-a (Gr. 

 epi, upon ; sternon, the breast- 

 bone), the lateral pieces of the 

 dorsal arc of the somite of a 

 Crustacean : episternal, a., $p'- 

 i-stern'-al, situated on or above 

 the sternum or breast-bone. 



epistome, n., ep-is f -tdm-e (Gr. epi., 

 upon ; stoma, a mouth), a valve- 

 like organ which arches over the 

 mouth in certain of the Polyzou. 



epistrophy, n., Zp-is'-trtif-i (Gr. 

 epistrophe, a turning about, con- 

 version from epi, upon; strophe, 

 a turning), in bot., the reversion of 

 a monstrous or variegated form 

 to a normal one ; a mode of dis- 

 tribution of protoplasm and 

 chlorophyll granules on free cell- 

 walls under the action of light. 



epithallus, n., Kpfctttt&i (Gr. 

 epi t upon ; thallos, L. thallus, a 

 young shoot or branch), the cort- 

 ical layer of Lichens: epithalline, 

 a., Zp'-i-thattlin, growing on the 

 thallus. 



epitheca, n., ep'4-thek'a (Gr. epi t 

 upon ; theJce, a sheath, a box), a 

 continuous layer surrounding the 

 thecse in some corals externally : 

 epithecium, n., ep'-i-the'shi-um, 

 the surface of the fructifying disc 

 in certain Fungi and Lichens. 



epithelioma, n., %p r -i-thel f -i'dm'a 

 (formed from epithelium, which 

 see), epithelial cancer, occurring 

 on tegumentary or mucous sur- 

 faces, the lips and cheeks being 

 the parts most commonly affected 

 by it. 



epithelium, n., ^p'-l-fhel'-i-um (Gr. 

 epi, upon ; thele, the nipple, or 

 thallo, I grow), the layer of cells 

 forming the surface of all 

 the internal membranes of 

 the body of the same nature 

 as epidermis, but much finer j 



in plants, a finer epidermis having 

 thin cells filled with colourless 

 fluid, and lining the ovary, etc. : 

 epithelial, a., tp'i-thel'-i-al, pert, 

 to or formed of epithelium : 

 epitheliated, a., Zp'-i-thel'-i-at-Zd, 

 covered with the delicate lining 

 called epithelium, as a serous 

 cavity, a membrane, etc. 



epitrochlea, n., ep'-i-trdtflg-a (Gr. 

 epi, upon; trochilia, L. trochlea, 

 a pulley, a roller), in anat., the 

 inner condyle of the humerus. 



epizoon, n., %p f 'i'Zd r -8n t epizoa, n. 

 plu., Zp'-i'Zo'-a (Gr. epi, upon ; 

 zodn, an animal), animals which 

 are parasitic upon other animals, 

 infesting the surface of the body; 

 a division of the Crustacea which 

 are parasitic upon fishes; opposed 

 to ' entozoon ' and ' entozoa. ' 



epizootic, a., tp'-i-zo-Zt'-ik (Gr. epi, 

 upon ; zob'n, an animal), applied 

 to diseases prevailing among 

 animals, corresponding to 'epi- 

 demic ' diseases among men. 



epulis, n., %p f -ul-is (Gr. epi, upon; 

 oulon, gum), a tumour of the 

 gum, often connected with a 

 carious tooth. 



equinia, n.,e-lciu ! in f >i>a, alsoequina, 

 n., V'kwin'-a (L. equinus, of or 

 belonging to ahorse from equus, 

 a horse), glanders and farcy, a 

 contagious disease peculiar to the 

 horse and mule, but capable of 

 transmission to man. 



Equisetaceae, n. plu., Vk'-wi-se-taf- 

 s$-e (L. equisetis, the plant horse- 

 tail from equus, a horse ; seta, 

 hair), the Horse-tail family, an 

 Order of plants found in ditches, 

 lakes, rivers, and damp places, so 

 called in allusion to the fine hair- 

 like branches : Equisetum, n. , 

 elc'wi'Set'-um, the only known 

 genus of the Order ; from the 

 quantity of silicic acid contained 

 in them, some of the species are 

 used in polishing mahogany : 

 Equisetum hyemale, hl f -em-dl f -e 

 (L. hiZmdlis, of or belonging to 

 winter from hiems, winter), a 



