492 GLOSSARY 



Or'gan. [From the Gr. organon, an " instmment, implement, tool.") 



Any part of the body with a special function. 

 O'rifice. [From the Lat. os, oris, a "mouth," and facere, "to make."] 



An opening. 

 Os, pi. Ora. [Lat.] A mouth. 

 Os, J)!. Ossa. [Lat.] A bone. 

 Os Cox'ae. The hip bone, or os innominatum. 

 Oscilla'tion. [From the Lat. oscillare, "to swing."] Swinging backward 



and forward; vibration. 

 Os'sa Innomina'ta, pi. of Os Innomina'tum. [Lat.] " Unnamed bones." 



The irregular bones of the pelvis, unnamed on account of their non- 

 resemblance to any known object. 

 Os'seous. [From the Lat. os, a " bone."] Consisting of or resembling 



bone. 

 Os'sicle. [From the Lat. ossicvlum, dim. of os, a " bone."] A small 



bone. 

 Os'teoblasts. [From the Gr. osteon, a " bone," and blastos, a " germ," 



or " sprout."] The germinal cells deposited in the development of 



bone. 

 O'toliths. [From the Gr. om.s, otos, the " ear," and lithos, a " stone."] 



Particles of calcium carbonate and phosphate found in the internal 



ear. 

 O'vum. pi. O'va. [Lat. an " egg."] The human germ-cell. 



Pal'ate. [From the Lat. pala'tum, the " palate."] The roof of the 

 mouth, consisting of the hard and soft palate. 



Pal'pebra, pi. Pal'pebrae. [Lat.] The eyehd. 



Pan'creas. [From the Gr. pan, " all," and kreas, " flesh."] A compound 

 secreting gland ; one of the accessory organs of nutrition. The 

 sweetbread of animals. 



Papil'lae. [Lat. pi. of papilla, a " nipple," a " pimple."] Minute emi- 

 nences on various surfaces of the body. 



Pari'etal. [From the Lat. paries, parietis, a " wall."] Pertaining to a wall. 



Parot'id. [From the Gr. para, " near," and om, otos, the " ear."] The 

 large salivary gland near the ear. 



Parturi'tion. [From the Lat. parturio, parturitum, to " bring forth."] 

 The act of bringing forth, of giving birth to young. 



Patel'la. [Lat " a httle dish."] A small, 6ou7-shaped bone ; the knee- 

 pan. 



