PRO 



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PRO 



a tumour of a sausage or pyriform 

 shape : prolapsus uteri, ut'-er-i 

 (L. ut$rus, the womb), the pro- 

 trusion of the womb at the vulva, 

 or below its natural level in the 

 pelvic cavity. 



prolegs, n. plu., pro'ttgz (L. pro, 

 for ; Eng. legs), the fleshy pedi- 

 form organs, often retractile, 

 which assist various larvae in 

 their movements ; the false 

 abdominal feet of caterpillars. 



proliferous, a., pro -lifter -us (L. 

 proles, offspring ; fero, I carry), 

 in bot., bearing abnormal buds ; 

 having an unusual development 

 of supernumerary parts, as when 

 flower-buds become viviparous, 

 or when leaves produce buds : 

 prolification, n., pro-llf-ik-af- 

 shun, the condition in which the 

 axis is prolonged beyond the 

 flower, and bears leaves, ending 

 in an abortive flower-bud, as in 

 the Rose and Geum. 



pronation, n., pr on- of- shun (L. 

 pronus, hanging downwards, 

 stooping), in anat., the act by 

 which the palm of the hand is 

 turned downwards, with the 

 thumb towards the body ; the 

 position of the hand so turned : 

 pronator, n., pron-dtftir, one of 

 the two muscles used in the act 

 of turning the palm downwards : 

 pronator teres. ter'-ez (L. teres, a 

 taper), a muscle which rolls the 

 radius inwards, together with the 

 hand : pronator quadratus, 

 kwdd-rdt'-us (L. quadratus, 

 square), a small flat quadrilateral 

 muscle, extending transversely 

 across the front of the radius and 

 ulva : prone, a., pron, prostrate; 

 lying flat on the earth. 



pr'opagulum, n., prdp-ag'ul'um 

 (L. propdgo, the slip or shoot of 

 a plant, offspring), in bot., an 

 offshoot or germinating bud 

 attached by a thickish stalk to 

 the parent plant ; a runner end- 

 ing in an expanded bud : pro- 

 pagula, n. plu., prop-tig'-til-a, 



powdery grains of the soredia of 

 Lichens. 



prophylactic, a., prof4lak'>tik 

 (Gr. prophulaktikos, preservative 

 from pro, before ; phulasso, 

 I preserve), in med., defending 

 from disease; preventive: n., 

 a medicine which preserves 

 against disease. 



propodium, n., pro-podium (Gr. 

 pro, before ; podes, feet), the 

 anterior part of the foot in 

 Molluscs. 



proptosis, n., prtip-toz'-ts (Gr. 

 proptosis, a falling down or 

 forwards from pro, before ; 

 ptosls, a fall), a protrusion of the 

 eyeball. 



proscolex, n., pro-skol f >eks (Gr. 

 pro, before ; skolex, a worm), the 

 first embryonic stage of a tape- 

 worm. 



prosencephalon, n., pros'-en-sef'* 

 til-tin (Gr. pros, before ; engkeph- 

 alon, the brain), one of the five 

 fundamental parts of the brain, 

 comprising the cerebral hemi- 

 spheres, corpus callosum, corpora 

 striata, fornix, lateral ventricles, 

 and olfactory nerve ; the cerebrum 

 proper in fishes. 



prosenchyma, n., prds-eng'-kim-d 

 (Gr. pros, before, addition ; 

 engcli&o, I pour in ; cheuma, 

 juice, tissue), in bot., fusiform 

 tissue forming wood ; tissue 

 formed of elongated pointed cells: . 

 prosenchymatous, a., pros'-eng* 

 kim'-at-us, of or pert, to prosen- 

 chyma. 



Prosobranchiata, n. plu., pros'5' 

 brang-ki-dt'-a (Gr. proso, in 

 front, in advance of ; brangchia, 

 gills of a fish), a division of 

 Gasteropodous Molluscs, in 

 which the gills are situated in 

 advance of the heart. 



prosoma, n., prd-somf-d (Gr. pro, 

 before ; soma, a body ; somdta, 

 bodies), in zool., the anterior 

 part of the body. 



prostate, a., prds'-ldt (Gr. pros- 

 tates, one who stands before 



