GLOSSARY. 



313 



/3Xa<TTt'a> I shoot up ; osteoblastic 

 corpuscles, those from which 

 bone is immediately formed. 



Otoconia, ous an ear, and Kovia 

 dust ; minute hard particles in 

 the vestibule of the ear. 



Otolith, ous an ear, and Xi'Oos a 

 stone ; used instead of otoconia; 

 also applied to larger bodiesfound 

 in the ears of some animals, as 

 fishes, to which the name oto- 

 conia would be inapplicable. 



Ovum, an egg ; applied only to a 

 germ which requires impregna- 

 tion before being developed. 



Palatal, palatus; the name of a 

 bone which, besides completing 

 the wall of the nasal cavity, 

 forms the back part of the hard 

 palate, behind the superior 

 maxillary. 



Pancreas, Tray all, and Kpeas flesh ; 

 the organ called by butchers 

 the sweetbread. 



Papilla, a nipple. The papillae of 

 the skin are the minute eleva- 

 tions into which the cutis vera 

 is thrown. 



Paralysis, Trapa-Xv^ I loosen from 

 beside ; the loss of nervous 

 power, either motor, sensory, or 

 both. 



Parietal, paries a wall. The pari- 

 etal layers of serous membranes 

 are those lining the walls of the 

 cavities within which the vis- 

 cera which they surround are 

 situated ; parietal bones, those 

 which form the middle part of 

 the roof of the skull. 



Parotid, Trapd beside, and ou the 

 ear ; the name of the salivary 

 gland which lies between the 

 lower jaw and the ear. 



Parthenogenesis, -jrapflei/os a vir- 

 gin, and yevf.Gi<s birth ; repro- 

 duction by means of au unim- 

 pregnated germ. 



Patella, a dish ; the knee-pan. 



Pelvis, a basin ; the cavity bound- 

 ed by the ossa innominata and 

 sacrum. The part below the 

 line extending round from the 

 base of the sacrum to the sym- 



physis pubis is the true pelvis; 

 the part between the expanded 

 blades of the iliac bones is the 

 false velvis. 



Pepsin, TreWo) or TTCTTTW to cook or 

 digest ; the active principle of 

 the gastric juice. 



Peptone, TreVTw; a nitrogenous sub- 

 stance rendered by action of the 

 gastric juice fit for absorption. 



Pericardium, napi around, and 

 KapSta the heart ; the serous in- 

 vestment of the heart, with the 

 fibrous bag in which it is con- 

 tained. 



Perichondrium, irepi around, and 

 XovSpos cartilage ; a fibrous 

 membrane containing blood- 

 vessels, surrounding cartilage. 



Perilymph, Trtpi around, and lym- 

 pha water; the fluid in which 

 the membranous labyrinth of 

 the ear is suspended. 



Periosteum, ^repi, and oo-reoi/ 

 bone ; the fibrous membrane 

 surrounding a bone, and con- 

 taining the ramifications of 

 arteries, small twigs of which 

 penetrate into the interior. 



Periphery, -Trcpi, and (pep to I bear ; 

 circumference ; the surrounding 

 parts as contrasted with any 

 centre. Thus the spinal nerves 

 are called peripheral nerves, as 

 contrasted with the nerve fibres 

 within the brain and spinal cord. 



Peristaltic, irtpt 9 and o-Te'XAeo I 

 dispose ; the name given to that 

 kind of movement which takes 

 place in the walls of the intes- 

 tine, the wave of contraction 

 embracing the viscus, and 

 travelling onwards ; likewise 

 called vermicular movement. 



Peritoneum, ir^i, and Teivw I 

 stretch ; the serous membrane 

 of the abdominal cavity. 



Petrous, TreVpos a stone ; stony. 

 The basal part of the temporal 

 bone is called the petrous por- 

 tion, on account of its hardness. 



Phalanx, (pd\ay% a line of soldiers ; 

 a rank ; a bone of a digit ; 

 named from those bones being 

 disposed in rows. 



