PREATACTIC 



431 



PROCESS 



Preatactic {pre-ah-tak'-tik). See Preataxic (Ulus. 

 Diet.). 



Precartilage {pre-kar'-til-aj). See Prochondrium 

 (Illus. Diet.). 



Precipitate. (See Illus. Diet.) 2. Headlong ; applied 

 to labor. 3. To cause precipitation. P., Fusible, 

 ■White. See Mercury-ammonium Chlorid, Fusible. 

 P., Infusible, White, P., Lemery's, ammoniated 

 mercury. P., Yellow, yellow oxid of mercury. 



Precipitin {pre-sip* -it-iii). Any one of many abso- 

 lutely specific precipitating bodies, which, according 

 to the Ehrlich lateral chain theory, are uniceptors, 

 composed of a haptophore group and a coagulative 

 complex. 



Preclavicular { pre-kla-vik 1 '-u-lar). Ventrad of the 

 clavicle. 



Precognition {pre-kog-nish'-un) \_pra, before; cog- 

 noscere, to know]. A knowledge of impending events 

 supernormal ly acquired. 



Preconvulsant ( pre-i; n-vul'-sanf). Relating to the 

 stadium of a disease preceding convulsions. 



Precuneate (pre-ku'-ne-at). See Precuneal (Illus. 

 Diet.). 



Preepiglottic (pre-ep-e-glot'-ik). Ventrad of the epi- 

 glottis. 



Preeruptive ( pre-e-rup/ -tiv). Preceding eruption. 



Prefrontal. (See Illus. Diet.) 2. The middle part 

 of the ethmoid bone (Owen). 



Pregnancy. (See Illus. Diet.) Cf. Gestation, Table of 

 (Illus. Diet.). See Signs, A/tlfeld's; Jacquemiei 1 s ; 

 Kennedy's; Mayor's; Osiander' s ; Pinard's: PascA's; 

 PeusneS s ; Pinmann's ; Schaefers. P., Fallopian. 

 See P., Tubal (Illus. Diet.). P., Intramural, inter- 

 stitial pregnancy. P., Mesenteric, tuboligamenlary 

 pregnancy. P., Parietal, interstitial pregnancy. P., 

 Sarcofetal, that in which both a fetus and a mole 

 are present. P., Sarcohysteric, spurious pregnancy 

 due to a mole. P., Tuboligamentary, that in which 

 there is secondary invasion of the broad ligament and 

 subperitoneal tissues. P., Uteroabdominal, that in 

 which there is one fetus in the uterus and another 

 in the abdominal cavity. P., Uteroovarian, that 

 in which there is one fetus in the uterus and another 

 in the ovary. P., Uterotubal, that in which one 

 fetus is in the uterus, another in the oviduct. 



Preleukemic ( pre-lu-ke'-mik). The stadium in a dis- 

 ease preceding the development of leukemia. Syn., 

 Aleukemi :. 



Prelimbic (pre-lim'-bik) [pro*, before ; limbus, a 

 border, a band]. Lying in front of a border or band. 



Premorphism ( pre-mor'-fizm ) [pra, before ; //op©?, 

 form]. The formative potentiality of a primitive cell 

 as determined by its " physiological units" or "de- 

 terminants." Cf. Id: Idant; Jdiosome ; Biophore ; 

 Mvphoplasm ; Plasome. 



Premycosic, Premycotic { pre-mi-ko' -sik, pre tni-kot' - 

 ik) [/>'<■?, before; u'vktjc, fungus]. Before the matur- 

 ity of the fungal element in a mycotic disease. 



Preoblongata, Praeoblongata {pre- ob-lon-ga'-taA') 

 [pra, before; oblongata]. The cephalic portion of 

 the oblongata ; situated mainly between the pons and 

 the fourth ventricle. 



Preovarian ( pre-o-va' '-re-au). Ventrad of the ovary. 



I Preperitoneal. See Preperitoneal (Illus. Diet.). 

 Prepotent (pre-po / -tetit\ [pm, before; posse, to be 

 able]. Having a marked tendency to transmit indi- 

 vidual characters to offspring. 

 Prepuberal [pre-pu'-bur-al). Prior to puberty. 

 Presbytic ( pres-bit'-ik). Suffering from presbyopia. 

 Presbytism (pres'-bit-izm). Presbyopia. 

 Presenile (pre-se / -nil) [prte, before; senilis, age]. 

 Prematurely old. 



Presenility (pre-se-nil'-it-e). Premature old age. See 

 Progeria. 



Presentation. (See Illus. Diet.) P., Oblique, P., 

 Trunk. .See /'., Transverse (Illus. Diet.). 



Press of Herophilus. See Torcular (Illus. Diet.). 



Pressor. (See Illus. Diet.) 2. A substance found 

 by Schaffer and Vincent in the infundibular part of the 

 hypophysis producing a rise in blood-pressure. Cf. 

 Depressor. P., Nerves, nerves which under stimula- 

 tion cause the vasomotor centers to react. 



Pressure. (See Illus Diet.) P., Bipolar, pressure 

 on the two ends of a bone. It is used in the diagnosis 

 of fractures from contusions, producing pain in the 

 case of the former. P. -effects. P. -signs, symptoms 

 manifested in the course of disease due to pressure 

 upon certain organs. 



Pretarsal | pre-tur'-sal). Located anterior to a tarsus. 



Preversion ( pn-: ur'-shuii) [pr<r, before; vertere,\o 

 turn]. A tendency to characteristics assumed to lie at 

 a further point of the evolutionary progress of a species 

 than has yet been reached. Cf. Kei-ersion. 



Prevertiginous ( pre-zur-ti '-in-usi [/'vr, before; ver- 

 tere, to turn]. Dizzy with a tendency to fall prone. 



Primisternal, Primisternalis ( pri-mis-tur 1 '-nal, pri- 

 mis-tur-na'-lis). Relating to the manubrium of the 

 sternum. 



Primula. (See Illus. Diet.) P. obconica, Hance, 

 produces a troublesome erythema of the skin among 

 gardeners. Cf. Dermatitis, Primal. 



Primulin {prim'-u-lin). See Cyclamin. 



Prismatoid (priz / -mat-oid). See Prismoid (Illus. 

 Diet. ). 



Prismosphere ( priz'-mo-sfer.) A combination of a 

 prism and a globular lens. 



Probion [pro-bi'-on) [Vpo, before; (itoc, life]. A 

 primary organism produced from unorganized poten- 

 tially organic substance [Nageli]. Merely a drop of 

 homogeneous structureless plasm, devoid of any form 

 and composed of albuminates associated only with the 

 compounds necessary for nutrition. 



Procerity ( pro-ser 1 '-it-e) [procerus, chief]. The propa- 

 gation of an able-bodied race by careful selection and 

 breeding. Cf. Megalanthropogenesia. 



Process, Processus. (See Illus. Diet.) P., Acces- 

 sory, of the first and second lumbar vertebras. See 

 Anapophy:is (Illus. Diet.). P., Anconeal, the olec- 

 ranon. P., Arciform. See Fibers, Arciform. P.s, 

 Articular. See Zygopophyses (Illus. Diet.). P.s, 

 Articular, Anterior or Superior. See Presyga- 

 pophyses (Illus. Diet.). P.s, Articular, Inferior or 

 Posterior. See Postzygopophyses (Illus. Diet.). P. 

 azygos, rostrum sphenoidale. P., Basipterygoid, one 

 of the spurs that grow out from the base of the skull to 

 catch the pterygoid bones in lizards and running birds. 

 P., Belenoid, the styloid process. P., Blumenbach's, 

 the uncinate process of the ethmoid bone. P. cau- 

 datus. 1. The caudate lobe of the liver. 2. The 

 lower end of one of the divisions of the antihelix of 

 the external ear. P., Conical, the odontoid process. 

 P., Corner Base. See P., Lateral-base (Illus. 

 Diet.). P., Cricoid, a slight projection on the lower 

 border of the thyroid cartilage. P., Cruciate, the 

 cross-shaped appearance of the tentorium, falx cere- 

 belli, and falx cerebri near the internal occipital emi- 

 nence. P., Cubital, the lower and articular end of 

 the humerus. P., Cuneiform. 1. The uncinate 

 process of the ethmoid. 2. The basal process of the 

 occipital bone. P., Dendritic, the branched process 

 of a nerve-cell. P., Dentate, the odontoid process. 

 P., Ectopterygoid, the external pterygoid process of 

 the sphenoid. P., Endopterygoid, the internal ptery- 

 goid process of the sphenoid. P. falciformis major, 



