494 GLOSSARY 



Perone'al. [From the Gr. perone, the " fibula."] Pertaining to the 



fibula; a term applied to muscles, or vessels, in relation to the fibula. 

 Pe'trous. [From the Gr. petra, a " rock."] Having the hardness of rock. 

 Phag'ocytes. [From the Gr. phagein, " eat," and kutos, a " cell." A 



Ij'^mph-corpuscle, or white blood-corpuscle, regarded as an organism 



capable of devouring what it meets, especially pathogenic microbes. 

 Phalan'ges. [Lat. pi. of phalanx, a " closely serried array of soldiers."] 



A name given to the small bones forming the fingers and toes, be- 

 cause placed alongside one another hke a phalanx. 

 Phar'ynx. [From the Gr. pharugx, the " throat."] The cavity forming 



the upper part of the gullet. 

 Phonation. [From the Gr. phone, the " voice."] Utterance of vocal 



sounds. 

 Phren'ic. [From the Gr. phren, the " diaphragm."] Pertaining to the 



diaphragm. 

 Pi'a Ma'ter. [From the Lat. pia (fem.), " tender," " delicate," and mater, 



" mother."] The most internal of the three membranes of the 



brain. 

 Pig'ment. [From the Lat. pigmentum, " paint," " color."] Coloring 



matter. 

 Pin'na. [Lat. a " feather," or " wing."] External cartilaginous flap of 



the ear. Same as auricle. 

 Pi'siform. [From the Lat. pismn, a " pea," and forma, " form."] Having 



the form of a pea. One of the carpal bones. 

 Pitu'itary. [From the Lat. pituita " phlegm."] Secreting or containing 

 ■ mucus, or supposed to do so. (It was formerly supposed that the 



secretions of the nose proceeded from the brain.) 

 Placen'ta. [From the Gr. plakous, a "cake."] A flat, circular, vascular 



substance which forms the organ of nutrition and excretion for the 



fa?tus in utero. 

 Plan'tar. [From the Lat. planta, " the sole of the foot."] Pertaining 



to the sole of the fooc. 

 Platys'ma. [From the Gr. plains, " broad."] A thin, broad muscle 



situated immediately beneath the skin at the side of the neck, and 



extending from the chest and shoulder to the face. 

 Plex'us. [From the Lat. plecto, plexum, to " knit," or " weave."] A net- 

 work of nerves or veins. 

 Pneumogas'tric. [From the Gr. pneumon, a " lung," and gaster, the 



" stomach."] Pertaining to the lungs and stomach. 



