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embryo cell, one of the two cells 

 formed from the first division of 

 the fertilized egg in certain plants, 

 developing later into the embryo, 

 the other developing into the 

 suspensor (bot.). 



embryo sac, the megaspore (bot.). 



embryogeny (embrioj'en!) n. [Gk. 

 embryon, embryo ; genos, birth.] 

 The processes by which the embryo 

 is formed (emb.). 



embryology (embriol'dji) n. [Gk. 

 embryon, embryo ; logos, discourse.] 

 That part of biology dealing with 

 the formation and development of 

 the embryo (biol.). 



embryonic (embrion'ik) a. [Gk. em- 

 bryon, embryo.] Pert, embryo (biol.). 



embryophore (em'briofor) n. [Gk. 

 embryon, embryo ; pherein, to bear.] 

 The ciliated mantle enclosing the 

 embryo in many tape-worms, and 

 formed from the superficial 

 blastomeres of the embryo (zool.). 



embryotegia (Smbriote'jia) n. [Gk. 

 embryon, embryo ; tegos, roof.] The 

 small hardened portion of the testa 

 which marks the micropyle in some 

 seeds and separates like a little lid 

 at the period of germination (bot.). 



embryotrophy (Sm'briot'rofi) n. [Gk. 

 embryon, embryo ; trephein, to 

 nourish.] The nourishment of the 

 embryo, or the means adapted to 

 that purpose (emb.). 



emergence (emeYjens) n. [L. ex, out ; 

 mergere, to dip.] Any of the out- 

 growths which arise from the sub- 

 epidermal tissue (bot.) zool.). 



emersed (emers't) a. [L. ex, out ; 

 mergere, to dip.] Rising above the 

 surface of the water ; appl. leaves 

 (bot.). 



eminence (em'inens) n. [L. eminens, 

 eminent.] Ridge or projection on 

 the surface of bones (anat.). 



emlnentla (em'ine'n'shla) n. plu. [L. 

 eminens, eminent.] Eminences. 



emissary (em'isari) a. [L. emittere, 

 to send out.] Coming out ; name 

 appl. veins passing through aper- 

 tures in the cranial wall and estab- 

 lishing connection between the 

 sinuses inside and the veins outside 

 (anat.). 



empodium (gmpo'dium) n. [Gk. en, 

 in ; pous, foot.] A small variable 



median structure between the claws 

 of many insects' feet (zool.). 



emulsln (emiil'sin) n. [L. emulgere, 

 to milk out.] An enzyme found in 

 certain plants (bot.). 



enamel (enam'el) n. [O.F. esmaillier, 

 to coat with enamel.] The hard 

 material containing over 90 per 

 cent, calcium and magnesium salts 

 which forms a cap over the dentine, 

 or may form a complete coat to the 

 tooth or scale in which it is found 

 (anat.). 



enamel cells, the cells which form 

 the enamel and are collectively 

 known as the enamel organ. 



enantioblastic (enan'tloblas'tik) a. 

 [Gk. enantios, opposite ; blastos, 

 bud.] Formed at the end of the 

 seed opposite the placenta (bot.). 



enarthrosis (en'arthro'sis) n. [Gk. en, 

 in ; arthron, joint.] Ball-and-socket 

 joint (anat.). 



encephalocoel (enkef'alosel, -sef-) n. 

 [Gk. enkephalos, within the head ; 

 koilos, hollow.] The cavity within 

 the brain (zool.). 



encephalon (enkef'alon, -sef-) n. [Gk. 

 enkephalos, within the head.] The 

 brain (anat.). 



encephalospinal (enkef'alospi'nal, 

 -sSf-) a. [Gk. enkephalos, within 

 the head ; L. spina, spine.] Pert. 

 the brain and spinal cord (anat.). 



enchylema (en'klle'ma) n. [Gk. en, 

 in ; chylos, juice.] The more fluid 

 protoplasm in a cell (biol.) : 



encyst (ensist') v. [Gk. en, in ; kystis, 

 bladder.] Of a cell or small animal, 

 to surround itself with an outer coat 

 or capsule (biol.). 



encystation (ensista'shun) n. [Gk. 

 en, in ; kystis, bladder.] Forma- 

 tion of a cyst or capsule (biol.). 



encystment (ensist'ment) n. [Gk. 

 en, in ; kystis, bladder.] Formation 

 of a firm, resistant envelope or 

 capsule (biol.). 



endarch (find'ark) a. [Gk. endon, 

 within ; arche, beginning.] With 

 a central protoxylem, or with 

 several surrounding a central pith 

 (bot.). 



endaspidean (end'aspid'ean) a. [Gk. 

 endon, within ; aspis, shield.] With 

 the scutes extending on the inner 

 surface of the tarsus (zool.). 



