130 



GLOSSARY. 



Pedig'erous (Lat. pes, a foot ; gero, 

 I bear). Carrying feet. 



Pedilu'vium (Lat. pes, a foot ; lavo, 

 I wash). Afoot-bath. 



Ped'iment (Lat. pes, a foot). In ar- 

 chitecture, the triangular surface 

 formed by the vertical termination 

 of a roof consisting of two sloping 

 sides, and bounded by three cor- 

 nices. 



Pedipal'pi (Lat. pes, a foot ; palpi, 

 feelers). A section of aracnnida, 

 remarkable for the large size of 

 their palpi, which are furnished 

 with claws or pincers, as the scor- 

 pion. 



Ped'uncle (Lat. pes, a foot ; cle, de- 

 noting smallness). A stein 



Pedun'culated (Ped'uncle). Growing 

 or supported on a stem. 



Peg'matite (Gr. irr)yfj.a, peyma, any- 

 thing fastened together). A form 

 of granite, being a fine-grained 

 compound of feldspar and quartz, 

 with minute scales of mica. 



Pelagic (Gr. 7reAa7os, pel'ayos, the 

 open sea). Belonging to the deep 

 sea. 



Pellag'ra (Lat. pellis cegra, diseased 

 skin). Italian leprosy ; a disease 

 of the skin common in the north of 

 Italy. 



Pellicle (Lat. pdlis, a skin ; cle, 

 denoting smallness). A thin skin 

 or film ; in botany, the outer cover- 

 ing of plants. 



Pellu'cid (Lat. per, through ; lu'ci- 

 dus, light). Clear ; transparent 



Pel'tate (Lat. pelta, a target). Ha- 

 ving the shape of a round shield or 

 target ; in botany, applied to leaves 

 having the stem inserted at or near 

 the middle of the under surface. 



Pelvic (Pelvis). Belonging to the 

 pelvis. 



Pelvis (Lat. a basin). In anatomy, 

 the cavity or inclosure in the ani- 

 mal body made up of the innomi- 

 nate bones, the sacrum, and the 

 coccyx, and supporting the lower 

 organs of the abdomen on the in- 

 side, and the lower limbs on the 

 outside. 



PempM'gus (Gr. Tre/*</, pemphix, a 

 small blister)^ A disease of the 



skin, consisting in an eruption of 

 blisters of various sizes, from the 

 size of a sixpence to that of a half- 

 crown. 



Pencil of Bays. In optics, a collec- 

 tion of rays of light radiating from 

 or converging to a common point, 

 and included within the surface of 

 a cone or other regular limit. 



Pendant (Fr. hanging, from Lat. 

 pen'deo, I hang). An ornament 

 used in the vaults and ceilings of 

 Gothic architecture. 



Pen'dulous (Lat. pen'deo, I hang). 

 Hanging. 



Pen'dulum (Lat. pen'deo, I hang). A 

 body suspended so that it may 

 vibrate about some fixed point by 

 the action of gravity. 



Penicil'late (Lat. penicil'lus, a small 

 brush). Having the form of a 

 pencil or small brush. 



Penin'sula (Lat. pene, almost ; in'- 

 sula, an island). A portion of 

 land nearly or in great part sur- 

 rounded by water, and joined to 

 the mainland by a part narrower 

 than the tract itself. 



Pennate (Lat. pcnna, a feather). 

 Winged. 



Pen'nifer (Lat. penna, a feather ; 

 fer'o, I bear). Covered with fea- 

 thers. 



Pen'nifonn (Lat. penna, a feather ; 

 forma, shape). Having the shape 

 of a feather ; in anatomy, applied 

 to muscles of which the fibres pass 

 out on each side from a central 

 tendon. 



Pen'ninerved (Lat. penna, a feather ; 

 nervus, a nerve). In bo/any, ap- 

 plied to leaves which have the 

 nerves or veins arranged like the 

 parts of a feather. 



Pennule (Lat. penna, a feather ; ule, 

 denoting smallness). A small fea- 

 ther, or division of a feather. 



Penta- (Gr. irwre, pente, five). A 

 prefix in compound words, signify- 

 ing five. 



Pentac'rinites (Gr. Trej/re, pente, 

 five ; Kpivov, Jcrinon, a lily). A 

 tribe of echinoderms, mostly fossil, 

 in which the animal consists of a 

 jointed flexible column fixed at the 



