PENNA 



1040 



PEPASTIC 



Penna (pen'-ah) [L., a feather, wing: pi., Pennce\. 



In biology, a large, stiff feather ; a quill-feather or 



contour- feather. 

 Pennaceous (pen-a'-se-us) [penna, a feather]. In 



biology, resembling a quill-feather or the structure re- 

 sembling the web of such a feather. 

 Pennate ( pen' '-at) [pennatus, winged ; penna, a wing]. 



In biology, winged, feathered. 

 Penniferous (pen-if'-er-us) [ penna, a feather ; ferre, to 



bear]. In biology, provided with feathers. 

 Penniform (pen'-iform) [penna, feather; forma, 

 , form] . Shaped like a feather ; said of certain muscles. 

 Pennigerous (pen-ij' -er-us). Same as Penniferous . 

 Penninerved (pen' -in-ervd) \_penna, a feather ; nervus, 



nerve]. In biology, feather-nerved or feather-veined ; 



pinnately nerved. 

 Pennopluma, Pennoplume (pen-o-plu'-mah, pen'-o- 



pliim) [penna, a wing ; pluma, a feather]. Same as 



Plumule. 

 Pennyroyal (pen'-e-roi-al). See Hedeoma and Pule- 



gium. 

 Pennyweight (pen'-e-wat) [AS., peningw&g, a penny- 

 weight]. A weight of 24 grains, or one-twentieth of 



the troy ounce. See Weights and Measures. 

 Pennywort (pen'-e-zvert). See Hydrocotile. 

 Penrose Disc. A solid rubber disc used as a substitute 



for the Senn bone-plate in intestinal anastomosis. 

 Pentabasic (pen-tab-a 1 '-sik) [ttevte, five ; basis, base]. 



Having five replaceable hydrogen atoms. 

 Y > ex\.\.a.cajpsvL\.a.r(pen-tak-ap / -su-lar)[TrevTE , five; capsula, 



a small box]. In biology, having five capsules or 



seed-vessels. 

 Pentacarpellary (pen-tak-ar'-pel-a-re) [ttevte, five; 



napTrog, fruit]. In biology, having five carpels. 

 Pentachlorether (pen-tak-lor-e'-ther) [ttevte, five; 



X?Mp6c, green ; aldr/p, ether], C 4 H 5 C1 5 0. A sub- 

 stitution-compound of ether, or diethyl oxid, in which 



five atoms of CI replace five of H. 

 Pentacoccus (pen-tak-ok' '-us) [ttevte, five ; k6kkoc, a 



berry, a kernel]. In biology, composed of five cocci, 



grains, or seeds. 

 Pentacrinin (pen-tak-ri'-nin) [ttevte, five ; uplvov, a 



lily]. In biology, a purple pigment discovered by 



Moseley in Pentacrinus, the sea-lily. 

 Pentact (pen'-takt) [ttevte, five; anTig, ray]. In 



biology, having five rays, arms, or branches. 

 Pentacyclic (pen-tas-i' '-klik) [ttevte, five ; Kvn'kog, a 



circle]. In biology, in five whorls. 

 Pentad (pen'-tad) [ttevte, five]. A quinquivalent ele- 

 ment or radicle. 

 Pentadactylism (pen-tad-ak'-iil-izm) [ttevte, five; 



Sa.KTv2.og, finger]. The state of having five digits. 

 Pentadactylous (pen-tad-ak'-til-us) [ttevte, five; 



dcLKTv'koc, finger]. Having five fingers. 

 Pentadelphous (pen-tad-el' -f us) [ttevte, five ; adskxpdg, 



brother]. In biology, arranged in five brotherhoods 



or sets. 

 Pentafid (pen' -taf-id) [ttevte, five ; findere, to cleave]. 



In biology, cleft into five divisions. 

 Pentaglucose (pen-tah-glu' -kos) [ttevte, five ; yAvicvg, 



sweet]. A glucose group, which differs from the true 



carbohydrates by yielding furfurol instead of levulinic 



acid when treated with hydrochloric acid of a certain 



concentration, and in certain color-reactions. 

 Pental (pen'-tal) [ttevte, five], C 5 H 10 . Trimethylethy- 



lene ; said by v. Mering to be a safe and effective 



anesthetic. See Anesthetic 

 Pentamerous (pen-tarn' -er-us) [ttevte, five; fJ-tpog, 



part]. In biology, constructed on the numerical plan 



of five ; five- parted. 

 Pentamethylendiamin ( pen - tarn - eth - il- en- di' '-am -in) . 



See Ptomains, Tabic of. 



Pentane (pen' -tan) [ttevte, five], C 5 H 12 . A hydro- 

 carbon, the fifth in number, of the paraffin series. See 

 Hydrocarbons, Table of. 



Pentapetalous (pen-tap-et' -al-us) [ttevte, five ; TTETa/.ov, 

 a leaf]. In biology, having five petals. 



Pentaphyllous (pen-taf-W -us) [ttevte, five ; (pv/lov, 

 leaf]. In biology, having five leaves. 



Pentapterous (pen-tap' -ter-us) [ttevte, five ; TTTEp6v, 

 wing]. In biology, having five wing-like expansions. 



Pentasepalous (pen-tas-ep' -al-us) [ttevte, five ;sepahim, 

 a sepal]. In biology, having five sepals. 



Pentaspermous (pen- tas- per' -mus) [ttevte, five; 

 oTTEpfia, seed]. In biology, five-seeded. 



Pentastichous (pen-tas' -tik-us) [ttevte, five ; arixog, a 

 row, line]. In biology, arranged in five vertical 

 ranks. 



Pentastoma (pen - tas'- to - mah ) [ttevte, five ; croua, 

 mouth]. A genus of entozoa, worm-like parasites, 

 generally referred to the class Arthropoda. There are 

 many species, several of which have been found en- 

 cysted in the human liver and lungs. See Linguatula 

 and Pentastoma under Parasites (Animal), Table of. 



Pentatomic (pen - tat - om'- ik) [ttevte, five ; uTOfioc, 

 atom]. In chemistry, having five replaceable hydro- 

 gen atoms in the molecule. 



Pentavalent (pen-tav'-al-ent) [ttevte, five; valens, 

 having power]. In chemistry, capable of combining 

 with five univalent elements or radicles. 



Pentoic Acid (pen-to' -ik). Synonym of Acid, 

 Valeric. 



Pentonville System. See Ventilation. 



Pentoses (pen-to' -sez) [ttevte, five ; ose, a characteristic 

 termination of the group of carbohydrates]. In 

 chemistry, bodies containing five carbon atoms and 

 hydrogen and oxygen in the proportion to form water, 

 as C 5 H 10 O 5 . Pentoses are produced by the hydrolysis 

 of pentosans, which are found in considerable propor- 

 tion in plants. See Carbohydrates, Table of. 



Pentosuria (pcn-tos-u'-rs-ah) [ttevte, five ; ovpov, urine]. 

 The presence of pentoses in the urine. 



Pentoxid (pen-toks'-id) [ttevte, five ; bl-vg, sharp]. An 

 oxid containing five oxygenations. 



Penzoldt and Faber's Test. A test for the absorptive 

 power of the stomach. Two or three grains of potas- 

 sium iodid enclosed in a gelatin capsule, which is well 

 wiped to remove all trace of the salt from its exterior, 

 are ingested with a wineglassful of water on an empty 

 stomach. The salt is absorbed from the stomach, and 

 appears normally in the saliva in from six and a half 

 to fifteen minutes. In diseased conditions in which 

 absorption is tardy, e.g., gastric catarrh, dilatation, and 

 carcinoma, the saliva may not contain it for several 

 hours. Its presence is recognized by the patient 

 moistening with the saliva filter-paper which has been 

 first saturated with starch-paste and dried. Touch 

 the moistened spot with fuming HN0 3 and a blue 

 coloration shows the presence of iodin. 



Penzoldt's Reagent. A reagent for the detection oi 

 sugar in the urine. It consists of diazobenzosulphuric 

 acid and caustic potassa. See Tests, Table of. P.'s 

 Test, a test for dilatation of the stomach. Tin 

 of dulness over the empty stomach will not ext< 1 

 the nave!. Now let the patient swallow a quart ol 

 water, and in cases of dilatation dulness will he found 

 along a line below the navel. 



Peony (pc'-o-nc) [Traiuvla, the peony]. The ro 

 Paonia officinalis, of reputed value in the convulsions 

 of children. Dose, inf. , 3 ij-^ j. Unof. P.-red. 

 Same as Corallin-red. 



Peotomy (pe-ot'-o-me) [rriog, penis ; ro//^, a cutting]. 

 Amputation of the penis. 



Pepastic ( pe-pas' -tik) [TTEiraivEiv, to ripen]. Hasten- 



