PROTOPODITIC 



1196 



PROTRUSIO 



(endopodite) and the outer branch (exopodite) ; or a 

 third division added in appendages concerned in res- 

 piration (epipodite). 



Protopoditic {pro - to - po - dit' '- ik) [npuroc, first ; -novc-, 

 foot]. Pertaining to a protopodite. 



Protopodium (pro-to-po' '-de-um) [npuroq, first ; irovg, 

 foot: pi. , Protopodia\. In biology, the primitive or 

 typical podium or foot of a mollusc. 



Protoproteose (pro-to-pro' '-te-os) [Vpwroc, first ', proteose], 

 A white powder, readily soluble in water, yielding a 

 slightly turbid fluid. 



Protopsyche (pro-to-si'-ke) [7rpwroc, first; ipvxv< soul]. 

 In biology, HaeckePs term for the fore-brain. Cf. 

 Psyche. 



Protopterous (pro-top' '-ter-us) [npuroc, first ; irrepov, 

 wing]. In biology, having a simple or primitive type 

 of limb. 



Protopterygium (pro - to - ter - if- e - um) [rrpuTog, first ; 

 nrepvi;, fin]. In biology ; the anterior osseous piece 

 joining the pectoral fin of fishes to the pectoral arch. ' 



Protoquinamicin ( pro - to - kwin - am'- is - in) [ nfiuroc, 

 first; Sp. , quina, bark ; amin~\, C 17 H 20 N 2 O 2 . A sub- 

 stance which is obtained when quinamin sulphate is 

 heated to 120 C. 



Protosalt (pro'-to-sawlt) [npuroc, first ; ME., salt, salt]. 

 In chemistry, that one of two or more compounds of 

 a metal with an acid which contains relatively the 

 least quantity of metal. 



Protosoma (pro-to-so'-mak) Trpuroc, fish; ou/ua , body~\ . 

 In embryology, a large oval spot in the center of the 

 transparent area of the blastoderm, and representing 

 the primitive stage in the development of the embryo. 



Protosomite (pro-to-so'-mlt)[Trpurog, first ; au/ia, body]. 

 In biology, a rudimentary somite or segment in a worm 

 or arthropod. 



Protosomitic (pro-lo-so-mif '-ik) [rrpuroc, first; oufia, 

 body]. Primitively segmented ; pertaining to a proto- 

 somite. 



Protospasm (pro'- to -spasm) rrpcbrog, first; a-rtapfioc, 

 spasm]. A spasm beginning in one limb and extending 

 to the other on the same side, to the head, or to the en- 

 tire half of the body. It may become general. 



Protospermatoblast (pro-to-sper' '-wat-o-blast) [jrpuroc, 

 first; aizepua, seed; fS?Mar6g, bud, sprout, shoot]. 

 In biology, one of the "small cells," or "parent 

 cells " (Samenstammzellen, Stammzellen, of German 

 writers), forming part of the layer of cells next the 

 tunica propria of the seminiferous tubules and from 

 which arise the spermatoblast, and finally spermato- 

 zoa. 



Protospore (pro'-to-spor) [n-pwroc, first; airopoq, seed]. 

 A primary spore or seed from which a prothallus or 

 similar body is developed. 



Protostoma (pro - tos'- to - mah ) \_irpuroq, first ; ard/Lia, 

 mouth: pi. , Protostoma ta]. In biology, the primitive 

 opening of the gastrula-sac,. formed by the invagina- 

 tion of the blastula. It is also termed the Anus of 

 Rusconi. 



Protosulphate (pro -to- sul'-fat) [npuroc, first; sul- 

 phur, sulphur]. The one of a series of sulphates 

 which contains relatively the smallest amount of sul- 

 phuric acid. 



Prototergite (pro- to- ter'- jit) [npiJToc, first; tergum, 

 back]. In biology, the first dorsal segment of the 

 abdomen of insects. 



Protothallus (pro-to-thal' -us) [Vpcjroc, first ; 6a'A?,6g, a 

 young shoot: //. , Protothalli~\. In biology: (a) 

 Same as Prothallium. (l>) Same as Hypothallus. 



Protothorax (pro-lo-tho' -raks) [Trpwroc, first ; dupai;, 

 thorax]. Same as Prolhorax. 



Prototypal (pro-to-ti'-pa/) [Trpwroc, first ; rvnog, type]. 

 Pertaining to a prototype. 



Prototype (pro' - to - tip) [npuroc, first; tvttoq, type]. 

 A model after which something is copied. 



Prototypembryo (pro-to-tip-em' '-bre-o) \jTpurog, first ; 

 t'vtzoc, type ; ifijipvov, embryo]. A late stage of 

 the embryo which exhibits the essential characters of 

 the group to which it belongs. 



Protoveratrin (pro-to-ver-af -rin) [Trpwroc , first ; vera- 

 trum, hellebore], C 32 H 51 NO n . A very poisonous 

 alkaloid derived from veratrin. 



Protovertebrse (pro- to-ver'- te - ore) [irpuroc;, first; 

 vertebra, vertebra]. A bastard word applied to any 

 one of the few pairs of small, dark bodies, separated 

 by lighter interspaces, on either side of the dorsal axis 

 of the embryo. They were formerly thought to be 

 the primitive vertebrae, but are now recognized as 

 muscle-plates or myotomes. They are of mesoblastic 

 origin. See Segment, Primitive. 



Protovertebral (pro-to-ver'-te-bral) [nouroq, first; ver- 

 tebra, vertebra]. Pertaining to the protovertebrse. 

 P. Somites. See Protovertebrce . 



Protovum (pro-to'-vum) [npurog, first; fyov, egg: pi., 

 Protova~\. In biology, an ovum or ovule at its most 

 primitive stage. 



Protoxid (pro-toks'-id) [irpuToc, first; 6, c rc, sharp]. 

 The one of a series of oxids of a metal or radicle 

 which contains relatively the smallest proportion of 

 oxygen. 



Protoxylem (pro - to -zi'- lent) [Trpuroc, first; 



wood]. In biology, the first-formed elements of the 

 xylem of a bundle. 



Protozoa (pro-to-zo'-ah) \_~purog, first; CcJov, animal]. 

 The lowest class of the animal kingdom, com] ; 

 organisms which consist of simple cells or colonii 

 cells, and which possess no nervous system, an 

 circulatory organs. Within recent years the study <>t 

 the lower forms of animal life in relation to disease 

 has been diligently pursued, and evidence is constantly 

 accumulating in favor of the view that certain cii- 

 of animals and of man are produced by prot< 

 For the parasitic protozoa of man and domestic ani- 

 mals see the following genera under Parasites | 

 mal), Table of: — Amoeba, Balantidiuin, Balbiania, 

 Bodo, Biitschlia, Cercomonas, Coccidium, Cysto" 

 Cytospermium , Dasytricha, Diplodinium, Eimeria. 

 Entodinium , Globidiu?n , Gregarina , HeemoplasiiioJiutn. 

 Herpetomonas, Heteromita, Megastoma , Microsporidia, 

 Miescheria, Monas, Monocercomonas, Opkryoscolex, 

 Polimitus, Rhophalocephalus, Sarcocystis, Trichomonas, 

 Trypanosoma. 



Protozoal, Protozoan (pro-to-zo'-al, pro-to-zo'-an) 

 [irpurog, first ; {(Jov, animal]. First, lowest, primitive. 



Protozoon (pro-to-zo'-on) [7rpwroc, first ; CJov, animal]. 

 One of the Protozoa. 



Protractile (pro-trak'-til) [pro, before ; Irak, 

 draw]. Capable of being protruded or thrust out. 



Protraction (pro-trak'-shun) [pro, before ; trahrre, to 

 draw]. Extraction, as of foreign bodies from wounds. 



Protractor (pro-trak' -tor) [ pro, before ; trah. 

 draw]. I. A surgical instrument used for dr: 

 extraneous bodies from wounds. 2. A math' 

 instrument employed in measuring angles and rei 

 them on paper. 3. A muscle that draws forward. 



Protrahens (pro-Irak' -ens) [L.]. A drawing forward. 

 P. auriculae, a muscle drawing the pinna forward 

 It is known, also, as the Attrahens aurevi. See .1/ 

 Table of. P. lentis, the ciliary muscle of 0.\ 



Protrude (pro-trud') [prolrudere, to thrust forward]. 

 To thrust forward or to be thrust forward. 



Protrusile (pro-tru'-sil). Synonym of Prot-. 



Protrusio ( pro-tru'-se-o) [L.] . Synonym of /X .' 

 P. enorbitalis, protrusion of the orbit and tli 

 P. exorbitalis, P. oculi. Synonym of Exophti: 



