120 



A GLOSSARY OF TERMS 



PLICA'TULA. fr. lat. plica, a fold. A 

 genus of mollusks. (Jig. 128, p 

 72, Book viii). 



PLOPOCA'RPIUM. A form of fruit 

 consisting of several follicles unit 

 ed in a single flower. 

 PLOTUS. fr. gr.pluo, I swim. The 



generic name of the darters. 

 PLOVER. fr. lat. pluvia, rain. A bird 

 so called, from making its appear- 

 ance in the rainy season. 

 PLUMAGE. fr. lat. pluma, a soft fea 

 ther. The feathery coat of a bird. 

 PLUMB-LINE. > fr. lat. plumbum, lead 

 PLUMMET. An instrument, con- 

 sisting of a string with a weight, 

 usually of lead, attached to a 

 straight staff, for the purpose of 

 ascertaining the direction of gra- 

 vitation, or the perpendicular to 

 the horizon. 



PLUME. A feather of a bird. 

 PLUMO'SE. Having a feathery ap- 

 pearance. 

 PLU'MULA. The young leaves in the 



embryo. 



PLU'MULE. fr. lat. plumula, a little 

 feather. A young diminutive 

 stem. 



PLURiLo'cuLAR.-Having many cells. 

 PLUTO'JTIC. After Pluto, the god of 

 fire. Relating to fire. Plutonic 

 rocks are unstratified crystalline 

 rocks, probably formed at great 

 depths beneath the surface by 

 igneous fusion. Volcanic rocks are 

 formed near the surface. 

 PKEUMATO'PHOHOUS. fr.gr. p-neuma, 

 air ; phoreo, I carry forward. Air- 

 conveying. Applied to the tubes 

 or vessels which circulate air in 

 the substance of plants. 

 PWEUMOGA'STRIC. fr. gr. pneumon, 

 the lung; gasler, the stomach. 

 The name of a nerve which is 

 distributed chiefly to the organs 

 contained in the chest and abdo- 

 men. 

 POD. A kind of dry seed-vessel, 



not pulpy. 



PO'DICEPS. The generic name of 

 the grebes. 



PODOOT'ITIUM. fr. gr. pous, podo t a 

 foot; gune, a female The stalk 

 upon which the ovary is seated 

 in certain plants. 



PO'BOSPERM. fr. gr. pous, foot ; sper- 

 ma, seed. The seed-stalk, or little 

 stem which attaches the seed to 

 the placenta. 



POIKILI'TIC. fr. gr. poikilos, varie- 

 gated. A name applied to the 

 new red sandstone formation in 

 consequence of the varieties of 

 colours it exhibits. 

 POL,-POLLT. fr. gr. polus, many. A 



prefix, denoting many, or much. 

 POLAKE'NIUM. A fruit consisting of 



several akenia, or achania. 

 PO'LLEK. The fertilizing powder of 



plants. 



POLTADE'LPHIA. fr.gr. polus, many; 

 delphos, brotherhood. Name of a 

 Linnaean class of plants. 

 POLTA'JTDRIA. fr. gr. polus, many; 

 aner, stamen. Name of an order 

 of plants. 



POLTANTHOCA'RPOUS. fr. gr. polus, 

 many ; ant has, flower ; karpos, fiuit. 

 Applied to a form of fruit com- 

 posed of many flowers. 

 POLTCA'RPOUS. fr. gr. karpos, fruit. 

 Applied to a plant which has the 

 power of bearing fruit many 

 times without perishing. 

 POLYCOTTLE'DOJTOUS. Having seeds 



with more than two cotyledons. 

 POLYGA'MIA. fr. gr. polus, many ; 

 gamos, marriage. Name of a Lin- 

 nean class of plants. 

 POLY'GAMOUS. fr. gr. polus, many ; 

 gamos, marriage. When animals 

 do not live in pairs, but on the 

 contrary, one individual is united 

 to several of the opposite sex, 

 they are said to be polygamous. 

 POLTGAS'TRIC. fr. gr. polus, many; 

 gaster, stomach. Having many 

 stomachs. 



POLTGAS'TRICA. Lat. Polygastric. 



POLTGLOT'TUS. fr. gr. polus, many ; 



glossa, tongue. Many -tongued. 



Specific name of the mocking- 



bird. 



