ECT- 



84 



ELA- 



protozoan cell (zool.) ; the layer 

 next the cell-wall (bot.). 



ectosarc (ek'tosark) n. [Gk. ektos, 

 outside ; sarx, flesh.] The ex- 

 ternal, often highly specialized, 

 layer of protoplasm in a Proto- 

 zoon (zool.). 



ectosome (ek'tosom) n. [Gk. ektos, 

 outside ; soma, body.] The en- 

 veloping portion of a Sponge con- 

 taining no flagellated chambers 

 (zool.). 



ectosphere (ek'tosfer) n. [Gk. ektos, 

 outside ; sphaira, globe.] The 

 outer zone of the attraction sphere 

 (cyt.). 



ectosppre (ek'tospor) n. [Gk. ektos, 

 outside ; sporos, seed.] The spore 

 formed at the end of each sterigma 

 in the Basidiomycetes (bot.). 



ectostosis (ek'tosto'sis) n. [Gk. ektos, 

 outside ; osteon, bone.] Formation 

 of bone in which the ossification 

 begins under the perichondrium 

 and either surrounds or replaces 

 the cartilage (anat.). 



ectotheca (ek'tothe'ka) . [Gk. ektos, 

 outside ; theke, cup.] The outer 

 coating of the gonotheca in certain 

 Hydroids (zool.). 



ectotrophic (ek'totro'f Ik) a. [Gk. ektos, 

 outside ; trephein, to nourish.] Find- 

 ing nourishment from outside ; appl. 

 Fungi which surround the roots of 

 the host with a web of hyphae (bot.). 



ectoturbinal (ek'totur'bmal) n. [Gk. 

 ektos, outside ; L. turbo, whirl.] 

 One of the divisions of the ethmo- 

 turbinals (zool.). 



ectozopn (ek'tozo'on) n. [Gk. ektos, 

 outside ; zoon, animal.] An ex- 

 ternal parasite (zool.). 



edaphic (edaf'ik) a. [Gk. edaphos, 

 soil.] Pert, or influenced by the 

 conditions of the soil (phys.). 



edentate (eden'tat) a. [L. ex, with- 

 out ; dens, tooth.] Without teeth 

 (zool.) ; without tooth-like projec- 

 tions (bot.). 



edriophthalmlc (gd'Hofthal'mik) a. 

 [Gk. edra, seat ; ophthalmos, eye.] 

 Having sessile eyes ; appl. certain 

 Crustacea (zool.). 



efferent (ef'firent) a. [L. ex, out ; 

 ferre, to carry.] Conveying from, 

 appl. vessels, lymphatics, etc. 

 (anat.) ; carrying outwards, appl. 



impulses carried outwards by the 

 motor nerves (phys.). 



egest (ejest') v. [L. ex, out ; gerere, 

 to carry.] To throw out ; to void ; 

 to excrete (phys.). 



egg (eg) n. [Icel.^gg-.] The matured 

 germ-cell of a female plant or animal 

 (biol.). 



egg-albumin, the chief constituent 

 of the white of egg, known to be a 

 mixture of glucoproteids (phys.). 



egg-apparatus, the two synergids 

 and ovum proper, near the micro- 

 pyle in the embryo sac of seed 

 plants (bot.). 



egg-case, a protective covering 

 formed by many animals for their 

 eggs (zool.). 



egg-cell, the ovum proper apart 

 from any layer of cells derived 

 from it or from other cells (zool.). 



egg-membrane, the layer of tough 

 tissue lining the shell of an egg 

 (zool.). 



egg-nucleus, the female pronucleus 

 (cyt.). 



egg-tooth, a small horny and cal- 

 careous structure on the tip of the 

 beak by means of which the embryo 

 breaks the shell (zool.). 



ejaculation (ejak'ula'shun) n. [L. ex, 

 out ; jacere, to throw.] Act of 

 suddenly ejecting a fluid from a 

 duct (phys?). 



ejaculatory (ejak'ulatori) a. [L. ex, 

 out ; jacere, to throw.] Throwing 

 out, appl. function of certain ducts 

 (Phys.). 



elaborate (elab'orat) v. [L. ex, out ; 

 laborare, to work.] To change 

 from a crude state to a state cap- 

 able of assimilation (pkys.) ; to 

 form complex organic substances 

 from simple materials (bot.). 



elaeoblast (ele'oblast) n. [Gk. elaion, 

 oil ; blastos, bud.] A mass of 

 nutrient material at the posterior 

 end of the body in certain Tunicates 

 (zool.). 



elaeodochon (el'eod'okon) n. [Gk. 

 elaiodochos, oil-containing.] The 

 preen-gland or oil-gland in birds 

 (zool.). 



elaioplast (ell'oplast') n. [Gk. elaion, 

 oil ; plastos, moulded.] A plastid 

 in a plant cell which forms or helps 

 to form oil globules (bot.). 



