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endorhachis (gn'dora'kis) n. [Gk. 

 endon, within ; rhachis, stem.] A 

 layer of connective tissue lining 

 the canal of the vertebral column 

 and the cavity of the skull (anat.). 



endosarc (fin'dosark) n, [Gk. endon, 

 within ; sarx, flesh.] See endo- 

 plasm. 



endosiphuncle (gn'dosifung'kl) n. 

 [Gk. endon, within ; L. siphunculus, 

 little tube.] The tube leading from 

 the protoconch to the siphuncle in 

 certain Cephalopods (pal.}. 



endoskeleton (eVdoskeTeton) n. [Gk. 

 endon, within ; skeletos, hard.] The 

 inner skeleton as opposed to the 

 exoskeleton (zoo!.). 



endosmosis (Sn'dSsmo'sTs) n. [Gk. 

 endon, within ; osmos, pushing in- 

 fluence.] The passage inwards 

 through a permeable or semi- 

 permeable membrane of a less 

 concentrated solution (phys.). 



endosome (e"n'dos5m) n. [Gk. endon, 

 within ; soma, body.] The chroma- 

 tinic mass near the centre of a 

 vesicular type of nucleus (cyt.). 



endosperm (gn'dospgrm) n. [Gk. 

 endon, within ; sperma, seed.] The 

 female prothallium (pot.). 



endospore (fin'dospor) n. [Gk. endon, 

 within ; sporos, seed.] The inner 

 coat of the sporocyst in some 

 Protozoa (zoo!.) ; an asexual spore ; 

 the inner coat of a spore wall 

 (bot.\ 



endosporium (Sn'dospo'rium), see 

 endospore. 



endosteal (e"nd8s'teal) a. [Gk. endon, 

 within ; osteon, bone.] Pert, the 

 endosteum (ana/.). 



endosternlte (eVdosteYnlt) n. [Gk. 

 endon, within ; L. sternum, sternum.] 

 The internal skeletal plate for the 

 attachment of muscles ; a free 

 skeleton situated in the prosoma 

 between the alimentary canal and 

 the nerve cord in Arachnids (zoo!.). 



endosttmm (gndos'teum) n. [Gk. 

 endon, within ; osteon, bone.] The 

 internal periosteum lining the 

 cavities of bones (anaf.). 



endostosis (gn'dosto'sis) n. [Gk. 

 endon, within ; osteon, bone.] Ossi- 

 fication which begins in the carti- 

 lage (anaf.). 



endostracum (gndos'trakum) n. [Gk. 



endon, within ; ostrakon, shell.] The 

 inner layer of the shell (zoo!.). 



endostyle (en'dostll) n. [Gk. endon, 

 within ; stylos, pillar.] A band 

 of thickened epithelium on the 

 oesophageal wall of a Tornaria ; 

 two ventral longitudinal folds separ- 

 ated by a groove in the pharynx 

 of the Tunicates ; a longitudinal 

 groove lined by ciliated epithelium 

 on the ventral wall of the pharynx 

 of Amphioxus (zoo!.). 



endotheca (gn'dothe'ka) n. [Gk. 

 endon, within ; theke, box.] The 

 whole system of dissepiments in any 

 given calyx of a coral ; the oval 

 surface of any Cystidea (zool.). 



endothecial (gn'dothe'ktal, -shial) a. 

 [Gk. endon, within ; theke, box.] 

 Pert, the endothecium ; with asci 

 in an ascocarp (bot.). 



endothecium (gn'dothe'ktum, -shium) 

 n. [Gk. endon, within ; theke, box.] 

 The central region of an epibasal 

 octant of the oospore of liverworts 

 and mosses ; the inner lining of an 

 anther (dot.). 



endothelium (Sn'dothe'llum) n. [Gk. 

 endon, within ; thele, nipple.] A 

 squamous epithelium which lines 

 the serous cavities, the heart, blood, 

 and lymphatic vessels (anat.). 



endothorax (e'n'dotho'raks) n. [Gk. 

 endon, within ; thorax, chest.] The 

 apodeme system in a crustacean 

 thorax (zoo!.). 



end-plates, the ramified expansions 

 within the muscular fibre which 

 form the ends of a motor nerve 

 (anat.). 



end-sac, the sac-like vestigial portion 

 of the coelom in the excretory glands 

 of certain Crustacea (zoo!.). 



endysis (gndl'sls) n. [Gk. endysts, 

 putting on.] The development of 

 a new coat (zoo!.). 



energesis (6n'6rj e'sts) n. [Gk. energein, 

 to be active.] The process by which 

 energy is liberated through kata- 

 bolic action (phys.). 



energld (6n'6rjld) n. [Gk. en, in ; 

 ergon, work.] Any living uni- 

 nucleated protoplasmic unit with 

 or without a cell wall (bot.) 



enervose (eneVvos) a. [L. ex, with- 

 out ; nervus, sinew.] Having no 

 veins, appl. certain leaves (bot.). 



