NEO- 



206 



NER- 



neos, new ; onyx, nail.] A soft pad 

 enclosing each claw of the embryo 

 of all unguiculate vertebrates and 

 of some other mammals, probably 

 to prevent the tearing of the foetal 

 membranes during movements of 

 the embryo ; also found in the 

 chick (zool.}. 



neopallium (ne'opal'i'um) n. [Gk. 

 neos, young ; L. pallium, cloak.] 

 In the mammalian brain, a definite 

 area of pallium for impressions of 

 tactile, visual, and other senses 

 (anat.}. 



neoteinia (ne'oti'ma) n. [Gk. neos, 

 young ; teinein, to stretch.] The 

 state of having development arrested 

 to prolong immaturity (biol.}. 



neoteinic (ne'otl'nik) a. [Gk. neos, 

 young ; teinein, to stretch.] Appl. 

 substitution royalties of termites 

 which remain undeveloped in cer- 

 tain respects (zool.}. 



neoteny (neot'Sni) n. [Gk. neos, young; 

 teinein, to stretch.] The retention of 

 larval characters beyond the normal 

 period, or the occurrence of adult 

 characteristics in the larva, ex- 

 emplified in Amphibia (zool.}. 



Neotropical (ne'otrop'lkal) a. [Gk. 

 neos, young ; trepein, to turn.] Pert. 

 or designating a zoogeographical 

 region consisting of South America, 

 the Antilles, and tropical North 

 America. 



Neozoic (ne'ozo'ik) a. [Gk. neos, young ; 

 zoe, life.] Pert, the period from the 

 Mesozoic to the present day (pal.}. 



nephric (nefrik) a. [Gk. nephros, 

 kidney.] Pert, the kidney (anat.}. 



nephridial (nefrid'ial) a. [Gk. nephros, 

 kidney.] Nephric, usually appl. the 

 small excretory tubules in the kid- 

 ney (anat.} ; alsoperf. the excretory 

 organ or nephridium of Inverte- 

 brates (zool.}. 



nephridiopore (nefrid'iopor) n. [Gk. 

 nephros, kidney ; poros, passage.] 

 The external opening of a nephridium 

 (zool.}. 



nephridium (nefrid'mm) n. [Gk. 

 nephros, kidney.] Any excretory 

 organ ; usually the excretory organ 

 of Invertebrates (zool.}. 



nephrocytes (ngf'roslts) n. plu. [Gk. 

 nephros, kidney ; kytos, hollow.] 

 Cells in Sponges which secrete 



waste and then migrate to the 

 surface of the body to discharge 

 (zool.}. 



nephrodinic (nef'rodin'lk) a. [Gk. 

 nephros, kidney ; odis, labour.] 

 Having one duct, serving for both 

 excretory and genital purposes 

 (zool.}. 



nephrogonaduct (nef'rogon'adukt) n. 

 [Gk. nephros, kidney ; gonos, off- 

 spring ; L. ducere, to lead.] Ex- 

 cretory and genital duct in one 

 (zool.}. 



nephroid (ngf'roid) a. [Gk. nephros, 

 kidney ; eidos, resemblance.] Kid- 

 ney-shaped (anat., zool.}. 



nephrolytic (nef'rdllt'ik) a. [Gk. 

 nephros, kidney ; lyein, to dissolve.] 

 Pert, or designating enzymatic 

 action destructive to the kidneys 

 (Phys.}. 



nephropore (nef 'ropor). \G\s..nephros, 

 kidney ; poros, passage.] A neph- 

 ridiopore (zool.}. 



nephros (nef'ros) n. [Gk. nephros, 

 kidney.] A kidney ; usually the 

 functional portion of a kidney 

 (anat.}. 



nephrostome (nefrostom) n. [Gk. 

 nephros, kidney ; stoma, mouth.] 

 The opening of a nephridial tubule 

 into the coelom or body cavity 

 (zool.}. ' 



nephrotome (ngf'rotom) n. [Gk. 

 nephros, kidney ; temnein, to cut.] 

 That part of a somite developing 

 into an embryonic excretory organ 

 (emb.}. 



nervated (ngr'vatgd) a. [L. nervus, 

 sinew.] Having nerves or veins 

 (bot.}. 



nervation (nerva'shun) n. [L. nervus, 

 sinew.] The disposition of nerves 

 in a leaf (bot.}. 



nerve (nerv) n. [L. nervus, sinew.] 

 One of the numerous grey fibrous 

 cords connecting the brain with all 

 other parts of the body (anat.} ; the 

 vein of an insect wing (zool.} ; a 

 vein (dot.}. 



nerve canal, a canal for passage of 

 nerve to the pulp of a tooth (anat.}. 



nerve cell, a cell characteristic of 

 brain and nerve tissue (anat.}. 



nerve centre, a collection of nerve 

 cells associated with one particular 

 function (phys.}. 



