GLOSSARY. 



147 



name given to certain muscles in 

 the region of the loins. 



Psori'asis. A disease of the skin con- 

 sisting of irregular patches covered 

 with white scales. 



Psy'chical (Gr. ^VXT), psuche^ the 

 soul). Relating to the doctrine of 

 the nature and properties of the 

 soul. 



Psychological (Gr. I//UXT?, psucke, 

 the soul ; Ao7os, log'os, discourse). 

 Relating to the doctrine of the 

 mind or soul. 



Psychology (Gr. tyvxn, psuche, the 

 soul ; \oyos, log'os, discourse). 

 The doctrine of the nature and 

 properties of the soul ; generally 

 applied with regard to the faculties 

 of the mind. 



Psychop'athy (Gr. ^vx~n, psuche, the 

 soul ; iraOos, path' os, suffering). 

 Mental disease. 



Psychrom'eter (Gr. $vxpos,psu'chros, 

 cold or cool ; (jLevpov, metfron, a 

 measure). A hygrometer, the in- 

 dications of which depend on the 

 depression of temperature procured 

 by evaporation in an atmosphere 

 not perfectly saturated with 

 moisture. 



Pter-, -pter'a, or pter'o- (Gr. inepov, 

 pter'on, a wing). A prefix, or a 

 termination, in compound words, 

 signifying relation or likeness to a 

 wing. 



Pterocar/pous (Gr. inepov, pter'on, a 

 wing ; Kapiros, Jcar'pos, fruit). 

 Having winged fruits. 



Pterodac'tyle (Gr. trrepov, pter'on, a 

 wing ; SOKTVAOS, daTdtulos, a 

 finger). A fossil flying reptile, 

 with an elongated wing-finger. 



Pter'opods (Gr. Trrepov, pter'on, a 

 wing ; TTOVS, pous, a foot). A 

 class of molluscous animals, having 

 a distinct head formed for floating 

 and swimming by means of two 

 fins, one being placed on each side 

 of the neck. 



Pterosau'ria (Gr. Trrepov, pter'on, a 

 wing; o-avpos, sau'ros, a lizard). 

 An order of fossil reptiles, having the 

 anterior limbs adapted for flying. 



Pter'ygoid (Gr. irrepv^ pter'ux, a 

 wing; ei'Soy, ci'dos, shape). Like 



a wing ; applied to a part of the 

 sphenoid bone, having some re- 

 semblance to a wing ; also to 

 muscles, vessels, nerves, &c., 

 having connection with, or relation 

 to, this part. 



Ptolema'ic (Gr. nroAf^ojos, Ptole- 

 mai'os, a Greek geographer and 

 astronomer). According to Ptolemy; 

 the Ptolemaic system in astronomy 

 was that which supposed the earth 

 to be fixed in the centre of the 

 universe, and the other bodies to 

 revolve round it. 



Pto'sis (Gr. vTuffis, pto'sis, a falling). 

 A paralysis of the upper eyelid, so 

 that it falls over the eye, and can- 

 not be raised. 



Pty'alism (Gr. itTvaXify, ptuali'zo, I 

 spit often). An excessive flow of 

 saliva. 



Pu/berty (Lat. puber, ripe of age). 

 The period at which childhood ends 

 and adolescence begins. 



Pubes'cence (Lat. pu'bes, the down of 

 plants). The downy substance, or 

 short and soft hairs, on plants. 



Pubes'cent (Lat. pu'bes, down). In 

 botany, applied to plants covered 

 with soft, short, downy hairs. 



Pud'dling. In iron manufacture, the 

 process by which the oxygen and 

 carbon of cast iron are expelled ; 

 the metal being induced by heat to 

 a pasty condition, and stirred so as 

 to expose every part to the action 

 of the air. 



Pug-mill. A machine for mixing and 

 tempering clay, consisting of an 

 iron cylinder, in which the clay is 

 cut and kneaded by a series of 

 knives revolving on an axis within 

 the cylinder. 



Pul'mograde (Lat. pul'mo, a lung ; 

 gra'dior, I step). Moving by lungs ; 

 applied to a tribe of invertebrate 

 animals which swim by means of 

 the disc on which the respiratory 

 apparatus is placed. 



Pul'monary (Lat. pul'mo, a lung). 

 Relating to the lungs. 



Pulmon'ic (Lat. pul'mo, a lung). Re- 

 lating to the lungs. 



Pulmonif 'erous (Lat. pul'mo, a lung ; 

 fer'o, I bear). Provided with lungs. 

 L 'A 



