PEN 



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PER 



pentandrous, a., 

 (Gr. pente, five ; aner, a male, 

 andros, of a male), in bot., 

 having five stamens, as a flower : 

 pentangular, a., -ang'-gul-ar (L. 

 angulus, an angle or corner), 

 having five angles : pentapet- 

 alous, a. , -pet'-dl-us (Gr. petalon, 

 a leaf), having five petals : 

 pentaphyllous, a., -fiV-lus (Gr. 

 phullon, a leaf), having five 

 leaves : pentasepalous, a., -sgp- 

 dl'tis (Eng. sepal), having five 

 sepals. 



Pentastoma, n. pl\i.,p%nt-as'ttim-d 

 (Gr. pente, five ; sttima, a mouth, 

 st&mtita, mouths), a genus of 

 parasitic worms having five 

 mouths or openings : pentastom- 

 ous, a., pent'as'-tom'US, having 

 five mouths or openings. 



pepo, n., pep'o, peponida, n. 

 plu., pep-8n'-%d'd (L. p$po, Gr. 

 pepon, a large melon, peponos, 

 of a large melon), a succulent, 

 one-celled fruit, with seeds borne 

 on three parietal placentas, 

 which comprise the fruit of the 

 Melon, Cucumber, and other 

 Cucurbitacese. 



pepsin, n., pips'-in (Gr. pepsis, a 

 digesting, a cooking from pepto, 

 I digest), the digestive principle 

 secreted by the stomach, used as 

 an aid to promote digestion, and 

 obtained chiefly from pigs' and 

 calves' stomachs : peptone, n., 

 ptp'-ton, a compound resulting 

 from the action of pepsin, along 

 with greatly diluted hydrochloric 

 acid, on albuminous substances : 

 peptic, a., pep'tik, relating to or 

 promoting digestion. 



percurrent, a., per-kur'rent (L. 

 per, through ; currens, running), 

 in bot. , running through from top 

 to bottom ; extending throughout 

 the entire length. 



percussion, n., per-ktish'-un (L. 

 percussus, thrust or pierced 

 through ; percussffi. a beating or 

 striking), the art of ascertaining 

 the physical condition of inter- 



nal organs by tapping the parts 

 over them with a plessor, which 

 may be the finger (immediate 

 percussion); or by rapping with 

 any plessor upon a pleximeter 

 of ivory, etc. , placed over the part 

 (mediate percussion). 



perenchyma, n., pfr-eng'-kim-a 

 (Gr. pera, a sac ; engcliuma, 

 what is poured in, an infusion ; 

 cheuma, tissue), in bot., cellular 

 tissue containing starchy matter. 



perennial, a., per-Zn'-ni-dl (L. 

 perennis, that lasts the year 

 through from per, through ; 

 annus, a year), lasting through 

 the year ; flowering for several 

 years. 



perennibranchiata, n. plu., ptir* 

 Zn'ni-brdngk'l-dtf-d (L. perennis, 

 that lasts the year through ; Gr. 

 brangchia, gills), those Amphibia 

 in which the gills are permanently 

 retained throughout life : per- 

 ennibranchiate, a., -brting&i'dt, 

 having the gills remaining 

 throughout life, as certain 

 Amphibians. 



Pereskia, n., pgr &&'# (after 

 Plereslc, a botanist of Aix in 

 Provence), a genus of grotesque 

 and ornamental plants, Ord. 

 Cetacese : Pereskia aculeata, ok- 

 ul'-e-dt'*a (L. aculedtus, thorny, 

 prickly), a species which pro- 

 duces the Barbadoes gooseberry, 

 used as an article of diet in "W". 

 Indies. 



perfoliate, a., per-fdl f >i-at (L. per, 

 through ; folium, a leaf), in bot. , 

 applied to a leaf having the lobes 

 of the base so united as to appear 

 as if the stem ran through it. 



perforans, a., perf-or-dnz (L. 

 perforo, I pierce through, perfor- 

 ans, piercing, perfordtus, pierced), 

 a muscle, so named from its 

 perforating the tendon of the 

 flexor sublimis: perforatus, a., 

 perf f >6r'dt f 'U8, a muscle, so 

 named from its tendon being 

 perforated by the tendon of the 

 flexor profundus. 



