GLOSSARY 377 



the various nervous organs, but especially in the nerves; it is of a 



white color. 



Nu-tri'tion (L. nu'frio, to nourish). The processes by which the nour- 

 ishment of the body is accomplished. 



(E-soph'a-gus (Gr.). Literally,' that which carries food; the tube lead- 

 ing from the throat to the stomach ; the gullet 

 0-le-ag'i-nous (L. o'leum, oil). Of the nature of oil : applied to an 



important group of food principles the fats. 

 01-fac'to-ry (L. oJfa'cio, to smell). Pertaining to the sense of smell. 

 Oph-thal'mo-scope (Gr. .600a\Aufc, ophthalmos, the eye, and o-/co7r<?o>, skopeo, 



to look at). An instrument devised for examining the interior of the 



globe of the eye. 

 Op'tic (Gr. 6pdw, tyo/wu, fut. opsomai, to see). Pertaining to the sense 



of sight. 

 Or'bit (L. or'bis, the socket). The bony socket or cavity in which the 



eyeball is situated. 

 Os'mose (Gr. uvfjAs, osmos, a thrusting or impulsion). The process by 



which liquids are impelled through a moist membrane. 

 Os'se-ous (L. os, a bone). Consisting of, or resembling bone. 

 Pal'ate (L. pala'tum, the palate). The roof of the mouth, consisting of 



the hard and soft palate. 

 Pal'mar. Relating to the palm of the hand. 

 Pan'cre-as (Gr. irdv,p"an 1 all, and Kp&$, kreas, flesh). A long, flat gland 



situated near the stomach ; in the lower animals the analogous organ 



is called the sweet-bread. 

 Pa-pil'lae (L. papil'la}. The minute prominences in which terminate 



the ultimate fibres of the nerves of touch and taste. 

 Pa-ral'y-sis. A disease of the nervous system marked by the loss of 



sensation, or voluntary motion, or both ; palsy. 

 Par-a-ple'gi-a (Gr. Tra/mTrXifavw, paraplesso, to strike amiss). A form of 



paralysis affecting the lower half of the body. 



Pa-tel'la (L. dim. of pat'ina, a pan). The knee-pan ; a small bone. 

 Pel 'vis (L.). Literally, a basin; the bony cavity at the lower part of 



the trunk. 

 Pep'sin (Gr. TT&TTW, pepto, to digest). The organic principle of the 



gastric juice. 

 Per-i-car'di-um (Gr. irepi, peri, and Kapdia, kardia, the heart). A porous 



membrane enclosing the heart, and secreting a lubricating fluid. 

 Per-i-stal'tic Move'ments (Gr. Trepto-rAXu;, peristello, to contract). The 



slow, wave-like movements of the stomach and intestines. 

 Per-i-to-ne'um (Gr. Trepireivu, periteino, to stretch around).. The invest- 

 ing membrane of the stomach, intestines, and other abdominal organs. 

 Per-spi-ra'tion (L. perspi'ro, to breathe through). The sweat, or watery 



exhalation of the skin ; when visible, it is called sensible perspiration ; 



when invisible, it is called insensible perspiration. 



