PRO- 



259 



PRO- 



proteroglyph (pro'tgrogHf) a. [Gk. 



proteros, earlier ; glyfihein, to carve.] 



I Having the specialized fang teeth 



permanently erect ; opp. soleno- 



- glyph (zool.}. 



proterogyny, protogyny. 



prothallium, prothallus. 



prothalloid (prothal'oid) a, [Gk. pro, 

 before ; thallos, young shoot ; eidos, 

 form.] Like a prothallium (hot.}. 



prothallus (prothal'us) n. [Gk.pro, 

 before ; thallos, young shoot.] A 

 small, thin, fleshy mass developed 

 from spores of ferns, itself produc- 

 ing antheridia and archegonia (dot.}. 



protheca (prothe'ka) n. [Gk. pro, 

 before ; theke, a box.] The rudi- 

 ment of coral formation ; the basal 

 part of the coral calicle (zool.}. 



prothorax (protho'raks) n. [Gk. pro, 

 before ; thorax, breast.] The an- 

 terior thoracic segment of Arthro- 

 pods (zool.}. 



prothrombin (prothrom'bln) n. [Gk. 

 pro, before ; thrombos, clot.] Throm- 

 bogen (phys.}. 



prothyalosome (prothfalosom) n. 

 [Gk. pro, before ; hyalos, glass ; 

 soma, body.] The area surrounding 

 the germinal spot in the germinal 

 vesicle (emb.}. 



protista (protts'ta) n. plu. [Gk. pro- 

 tistos, first of all.] The assemblage 

 of simple and primitive living beings 

 from which animals and plants 

 arise (owl.}. 



protobasidium (pro'tobasid'Ium) n. 

 [Gk. protos, first ; basidion, a small 

 pedestal.] A basidium producing 

 a mycelium of four cells from each 

 of which a sporidium is developed 

 by abstriction (bot.}. 



protoblast (pro'toblast) n. [Gk.protos, 

 first ; blastos, bud.] A naked cell, 

 devoid of membrane ; the first or 

 single-cell stage of an embryo ; the 

 internal-bud stage in the life-history 

 of Neosporidia (zool.}. 



protocercal (pro'toseVkal) a. [Gk. 

 protos, first ; kerkos, tail.] Having 

 the caudal fin divided into two ecjual 

 lobes ; diphycercal, the primitive 

 form of caudal fin (zool.}. 



protocerebrum (pro'toseVgbrum) . 

 [Gk. protos, first ; L. cerebrum, 

 brain.] The anterior pair of gangli- 

 onic centres of Crustacea (xool.}. 



protocnemes (pro'toknemz) n. plu. 

 [Gk. protos, first ; knetne, a wheel- 

 spoke.] The six primary pairs of 



larval shell of Molluscs, indicated 

 by the cicatrix on the adult shell 

 (zool.}. 



protocone (pro'tokon) n. [Gk. protos, 

 first ; konos, cone.] The inner cusp 

 of an upper jaw molar (anat.}. 



protoconid (pro'toko'nld) n. [Gk. 

 protos, first ; konos, cone ; eidos, 

 form.] The external cusp of a 

 lower jaw molar (anat.}. 



protoconule (prd'toko'nul) n. [Gk. 

 protos, first ; konos, cone.] An an- 

 terior intermediate cusp of an upper 

 jaw molar (anat.}. 



protocranium (pro'tokra'nlum) n. 

 [Gk. protos, first ; kranion, skull.] 

 A name sometimes given to the 

 posterior part of the epicranium of 

 Insects (zool.}. 



protoepiphyte (pro'togp'iflt) n. [Gk. 

 Protos, first ; epi, upon ; phyton, 

 plant.] A plant growing upon 

 another and getting all its nourish- 

 ment from that other (bot.}. 



protogenic (pr6'tqjgn'ik)a. [Gk.. protos, 

 first ; genos, offspring.] Persistent 

 from the beginning of development 

 onwards (biol.}. 



protoarynous (protSj'inus) a. [Gk. 

 protos, first ; gyne, woman.] Hav- 

 ing female elements mature before 

 male (biol.}. 



protogyny (prot8j'mi) n. [Gk. protos, 

 first ; gyne, woman.] Condition of 

 hermaphrodite plants and animals 

 in which female elements mature 

 and are spent before maturation of 

 male elements (biol.}. 



protokaryon (pro'tokar'lon) n. [Gk. 

 protos, first ; karyon, nut.] A simple 

 or primitive nucleus consisting of 

 a mass of chromatin suspended in 

 nuclear sap, as in small limax 

 Amoebae (cyt.}. 



protoloph (pro'toldf) n. [Gk. protos 

 first ; lophos, crest.] The anterior 

 transverse crest of upper jaw molars 

 (anat.}. 



protomala (pro'tb'ma'la) n. [Gk. 

 protos, first ; L. mala, cheek.] A 

 myriapod mandible (zool.}. 



