I 



PLATED 



nvi 



1 



pla 



orbit. P.. Palate, of the palate bone, the horizontal 

 portion which, with its fellow of the opposite side, 

 forms the greater part of the hard palate. P., Para- 

 chordal. Synonym of P., Lateral Mesoblastic. P., 

 Positive, of a voltaic cell, the electro-positive element 

 of a voltaic couple. P., Protovertebral. Synonym 

 of P., Lateral Mesoblastic. P., Pterygoid, one of the 

 processes of the sphenoid bone. P., Senn's. Syno- 

 nym of P., Approximation. P., Sieve. See under 

 P., Spindle, the part of a cell-plate located 

 ithin the cell-nucleus. P., Subcranial. See Post-oral 

 Irches. P., Tympanic. The plate of bone forming 

 be sides and floor of the auditory meatus. P., Utero- 

 placental. Synonym of Decidua serotina. P.. Val- 

 vular, a valve-like fold of tissue which fills the fora- 

 men ovale in the fourth month of fetal life, permitting 

 the passage of blood from the right to the left auricle, 

 but not in the contrary direction. P., Vascular, 

 mym of Lamina, Vascular. Ps., Vertebral, un- 

 divided masses of mesoblast, running longitudinally 

 between the lateral mesoblastic plates and the medul- 

 lary ridges. Also, the laminae on each side of the 

 primitive groove by the union of which the vertebras 

 are formed. P., Visceral, the splanchnopleure layers 

 of the lateral mesoblastic plates. P., Vitelline, the 

 peculiar, doubly refractive crystals, probably albu- 

 minoid in character, found in the egg-yolk of turtles, 

 frogs, and certain fishes. 



Plated (pla' -ted) [ME., plate, a plate]. In biology, 

 covered with dermal scales or scutes ; scutate, loricate. 



Platelet flat' -let ) [dim. of ME. , plate'] . In biology, a 

 blood-plate. Haliburton and Lilienfield regard the 

 platelets as probably disintegration-products of leuko- 

 cytes. They are composed of a substance rich in 

 phosphorus, which by gastric digestion is separated 

 into nuclein and albumin. 



Platesyntropy (plat-es-sin'-tro-pe) \_-7Arrc, flat; avv, 

 together; rpi—tiv, to turn]. In biology, Wilder's 

 term for the morphotropic relation between parts 

 upon the same side of the meson ; e. g. , the brachium 

 and the cubitum. 



Platetrope (plat'-et-rbp) \_-7.arvc, flat ; rpi~nv, to turn]. 

 In biology, one of two symmetrically related parts on 

 opposite sides of the meson ; a lateral homologue. 



Platetropy (plat'- et- ro - pe) [-/.aric, flat ; -pk^eiv, to 

 turn]. In biology, bilateral symmetry; Wilder's 

 term for the antitropical relation between parts upon 

 opposite sides of the meson ; e.g., the relation be- 

 tween the right and the left ear. 



Platiasmus (plat-e-az'-mus) [-/.aric, broad]. An im- 

 pediment to speech, due to a defect of the tongue, 

 causing thickness of speech. 



Platina plat-t '-nah ) [Sp. , platina]. The older name 

 of platinum. 



Platinamin (plat-in' -am-in) [Sp. , platina, platina ; 

 aw/;;]. An amin compound of platinum in which the 

 metal is quadrivalent. 



Platinammonium (plat - in -am-o'-ne- urn) [Sp. ,//<*- 

 tina, platina ; ammonium'] , PtN 2 H 6 . A quadrivalent 

 radicle. 



Platinate ( plat' -in-dt) [Sp., platina, platina]. A salt 

 of platinic oxid — a compound of platinum dioxid and 

 basic oxid. 



Platinic \ plat-in' -ik) [Sp., platina, platina]. Con- 

 taining platinum as a quadrivalent element. P. 

 Chlorid is used to distinguish potassium from sodium 

 and to precipitate salts of ammonium and of com- 

 pound ammonias, such as alkaloids. 



Platiniferous (plat-in-i/'-er-us) [Sp. , platina, platina ; 

 ferre, to bear]. Producing platinum. 



Platinous (plat'-in-us) [Sp., platina, platina]. Con- 

 taining platinum as a divalent element. 



1115 PLATYHIERIC 



Platinum ( plat' -in-um) [Sp., platina, platina]. Pt. 

 = 197; quantivalence II, IV; sp. gr. 21.5. A metal 

 of silver-white luster, only soluble in nitro-hydro- 

 chloric acid. It is employed in making vessels for 

 chemic and pharmaceutic use. In the form of wire, 

 affixed to a glass rod, it is used as the platinum nee 

 die or Oese in bacteriologic work. Platinum salts 

 are poisonous. See Elements, Table of. P., Black, 

 a very finely divided metallic platinum, which has a 

 great capacity for absorbing hydrogen and for con- 

 densing oxygen upon its surface. It is used for test- 

 ing amylic alcohol by oxidizing it into valerianic acid. 



Platode, Platoid (plaf-od,plaf-oid) [-/.arte, broad; 

 tidoc, form]. In biology, broad or fiat, as a worm. 



Plattner's Bile-crystals. A whitish semi-crystalline 

 mass obtained from an extract of bile-acids, by distil- 

 ling off the alcohol, dissolving the residue in a little 

 absolute alcohol, and adding ether until the solution 

 becomes turbid. 



Platula ( plat' -u-lah). Synonym of Pediculus pubis. 



Platurous (pla-tu'-rus) [properly, platyuraus ; irAaHx, 

 broad ; o'vpa, tail]. In biology, having a broad tail. 



Platy- (plat'-e-) [-?-aric, broad]. A prefix, signifying 

 broad. 



Platybasic (plat - ib - a' - sik) [ -7a rvc, broad ; fiaoic, 

 base]. Having a flat base, as certain skulls. 



Platybrachycephalic (plat-ib-rak-is-ef-al' -ik) [-7mtvc, 

 broad ; 3paxic, short ; K£<j>a7.i}, head]. Having a 

 flat and broad skull. 



Platybregmate (plat- ib - reg*- mat) [-/jarbc, broad; 

 ■ipeyua, bregma]. Having a wide bregma. 



Platybregmatic (plat - ib - reg -maf-ik). Synonym of 

 Platybregmate. 



Platycarpous (plat-ik-ar 7 -pus)[-7.aTvc, broad ; Kaprroc, 

 fruit]. In biology, having broad fruit. 



Platycelian, Platycelous (plat-is-el'-e-an, plat-is-el'- 

 us). Synonym of Opisthocelous . 



Platycephalia (plat-is-ef-a' -le-ah). Synonym of Platy- 

 cephaly. 



Platycephalic, Platycephalus (plat-is-ef-al'-ik, plat- 

 is-ef-al-us) \_-7.aric, wide ; Keoas.r/, head]. Having 

 a broad skull ; with a vertical index of less than 70 . 



Platycephaly ( plat-is-ef -ale) [-/.a-if, broad ; Ke<pa7Jj, 

 head]. The quality of being platycephalous. 



Platycnemia (plat - ik - tie'- me - ah) [-/urn c, broad ; 

 KV7)!i7), leg]. The quality of being platycnemic ; 

 broadness of the tibia. Platycnemia is a characteristic 

 of many tribes of the African race, and is generallv 

 associated with pilastered femur. 



Platycnemic (plal-ik-ne'-mik) [-/an'r, broad ; Kvrjfiri, 

 leg] . Having a tibia which is exaggerated in breadth. 



Platycnemism (plat-ik-ne'-mizm). See Platycnemia. 



Platycoria, Platycoriasis (plat-ik-o' -re-ak , plat-ik-o- 

 ri'-as-is) [-7atvc, broad ; noptj, pupil]. Expansion 

 of the pupil ; mydriasis. 



Platycyte ( plat' -is-tt) [-/.arvc, broad ; kvtoc, cell]. 

 A cell intermediate in size between a giant-cell 

 and a leukocyte, found in tubercle-nodules. 



Platydactyl (plal-id-ak'-til) [Tr/.arrc, broad ; Sdicrv/Mc, 

 finger]. In biology, having broad or thick digits. 



Platyelminthes, Platyhelminthes (plat- e-el-min'- 

 thez, plat-e-hel-min' -thez) [tz/mtvc, broad ; f/./mo, a 

 worm]. Flat-bodied, more or less elongated worms, 

 usually containing both sexual elements at the same 

 time. They include flat-worms, flukes, and tape- 

 worms. 



Platygastric (plat-ig-as / -trik) [rr/arrc, broad ; yaari/p, 

 belly]. In biology, having a broad, gastric cavity. 



Platyglossal (plat-ig-los'-al) [~7.arvr, broad; y7uuaaa t 

 tongue]. In biology, having a broad tongue. 



Platyhieric (plat-e-hi-er'-ik) [— 7arvc, broad; lep6c, 

 holy, sacrum]. Having a broad sacrum, in distinction 



