POPPY 



272 



POULTRY 



[L. porca, pig; 



Porcupine. 



Poppy, (pop'pi). [Papaver, the Latin name.]= 

 Papaver,g.v. Welsh P. 

 =Meconopsis. Horned 

 P.:=Glaucium. 



Poppy-worts=Papavera- 

 ceae, q.v. 



Populin, (pop'u-lin). 

 fPopulus, 9.v.]=C 2 oHo2 

 O 8 2H 2 O=A crystalline 

 substance, extracted 

 from the bark and leaves 

 of the aspen. 



Populus, ( pop ' u - lus ). 

 [The Latin name.] = 

 Poplar, a tree belonging Poppy, 



to Salicacese. P. tremula=A.s\>en. 



Porcelain, ( por'se-lari ). [Porcelaine, the 

 French word.]=Cl)ina : the finest variety of 

 earthenware, of which kaolin is the chief 

 constituent. 



Porcupine, ( porTcu-pm ). 

 spina, spine.] = Hys- 

 trix : a nocturnal ani- 

 mal, belonging to Ro- 

 dentia, having the body 

 covered with spines. 

 Canada P.=Erithizon. 



Pore -worts = Treman- 

 draceac, q.v. 



Porifera, ( por-if e-ra ). 

 [L. porus, pore; fero, I 

 bear.] P. vitrea, a siliceous sponge, the type 

 of Hexactinellidse, q.v. 



Poritidse, (por-it'i-de). [Gk. poritis, having 

 pores; eidos, form.] =Porites corals: adivisiou 

 of Madreporsea, with porus spongy corallum. 



Porphyrip, (por-fi'ri-o). P. melanotus; a S. 

 Australian bird, belonging to Rallidse. 



Porphyry, (por'fi-ri). [Gk. porphyra, purple,] 

 Generally, any rock containing crystals not 

 the same as the rock ; also a compact felspar 

 rock : a variety of trappean rock. 



Porpoise, (por'pus). [L. porcus, pig ; piscis, 

 fish.] = Delphirms : a 

 cetacean animal belong- 

 ing to Delphinidse. 



Port=Larboard: the left- 

 hand side of a vessel 

 looking towards the 

 bows. Porpoise. 



Portal circulation, (por'tal). Of blood from 

 the abdominal viscera (stomach, intestines, 

 &c.), through the liver to the hepatic vein. 



Portal vein, (por'tal). [L. porta, gate.] A 

 vein entering the liver, and formed by the 

 junction of veins from the stomach, intes- 

 tines, pancreas, &c. 



Portland, (port'land). [P. in Dorsetshire.] 

 P. beds : a sub-division of Upper Oolite, from 

 which is obtained the Portland building 

 stone of Dorsetshire. P. cement: a compound 

 of limestone and clay. 



Portrait, (por'tr^t). [The French word.] The 

 painted representation of a person, especially 

 of the features ; also used generally for engrav- 

 ings and crayon drawings of this character. 



Portugal laurel=.Cerasus lusitanica, 



Portuguese man-of-war=Physalia, q.v. 



Portulacese, (por-tu-la'se-e). [L. portulaca, 



little door.]=Purslanes: succulent herbs and 

 shrubs, chiefly American, belonging to Sile- 

 nales, named from the circular opening of 

 the capsule. 



Positive, (poz'i-tiv). [L. positivum, placed.] 

 In photography, a portrait or view taken 

 with a thin coating of collodion, or other 

 sensitive substance, and finished so as to be 

 itself the picture. P. crystals: those in which 

 the index of the extraordinary ray is greater 

 than that of the ordinary ray, v. Refraction. 

 P. electricity^ Vitreous electricity; v. Electri- 

 city. P. radicles = Basylous radicles, v. 

 Basylous. 



Post, (post). [L. post, after.] P. axial: por- 

 tions of organisms that are external or pos- 

 terior to the axis. P. meridian Afternoon: 

 expressed by P.M. P. pliocene=i,o\\>iT Post- 

 tertiary; rocks in which the shells are all of 

 living species, and the Mammalia in part 

 extinct. P. tertiary, v. Quaternary. 



Postulates, (pos'tu-lats). [L. postulo, I de- 

 mand.] Demands made, or matters to be 

 admitted, as bases of discussion. 



Potamides, (pot'a-midz). [Potamis, the typical 

 genius.] Molluscs, with spiral shells, found 

 in sea and in rivers; all herbivorous. 



Potamogeiton, (pot-a-moj'i-ton). [Gk. pota- 

 mos, river; yeiton, neighbour.] An aquatic 

 herb, belonging to Naiadaceae. 



Potash, (pot'ash). [Pot and Ashes.]=K 2 0= 

 Dipotassic oxide=Potassa: an alkaline sub- 

 stance obtained from wood ashes, and from 

 potash. Caustic P. = Potassic liydrate= 

 KHO: absorbs water. 



Potassiamide, (pot-as'i-a-mkl). [Potassium 

 and Aiiiide.]=A.mmom& in which part of the 

 hydrogen is replaced by potassium. 



Potassic, (p5-tas'sik). [Potassium, q.v.] Re- 

 lating to potassium ; containing potassium as 

 an ingredient. P. bitartrate = Cream of 

 tartar. P. hydrate=Ca.ustic potash=KHO. 

 P. nitrate = Saltpetre=Nitre = KNO 3 . P. 



Potassium, (po-tas'si-um). [Potash, q.v.]= 

 Kalium=K2: one of the alkali metals: a soft 

 bluish-white metal, lighter than water, with 

 an intense affinity for oxygen : found in alum, 

 felspar, <fec. ; faintly luminous during oxida- 

 tion in air. 



Potato,(po-ta'to). [Patata, the Spanish name.] 

 =Solanuni tuberosum: a plant belonging to 

 Solanacese. Sweet P.=Batatas. P. starch, 

 v. Starch. 



Potential energy, (po-ten'shi-al). [L. potens, 

 that may be.] = Energy of position, v. Energy. 



Potentilla, (po-ten-til'la). [L. potens, power- 

 ful. ]=- Cinquefoil : an herb, belonging to 

 Rosacese, named from its effect as a medicine. 



Poteriura, (po-te'ri-um). [Gk. poterion, cup.] 

 An herb, belonging to Rosacese. P. offici- 

 ate=Great burnet. 



Potstones. Very large flints, having a chalk, 

 nucleus, found in Upper Cretaceous strata. 



Pottery, (pot'ter-i). [Pot.]=Earthenware, q.v. 



Potto, (pot'to)." An animal belonging to Cer- 

 coleptes. African P. =Lemur. American P. 

 =Viverra. 



Poultry, (pol'tri). [Poult, young chicken.] 



