GLOSSARY 491 



Na'ris, pi. Na'res. [Lat.] A nostril. 



Neurax'oi^. [From the Gr. neuron, " nerve," and axon.] An axis cylinder 



process. 

 Neurilem'ma. [From the Gr. neuron, a " nerve," and lemma, a " coat," or 



" covering."] Nerve-sheath. 

 Neu'rone. [From the Gr. neuron, a " nerve."] The nerve-cell, inclusive 



of all its processes. 

 Node. [From the Lat. norfi/s, a " knot."] A knot, or what resembles one. 



A lymphatic ganghon. 

 Nucle'olus, pi. Nucle'oli. [Dim. of Lat. nucleus, a "kernel."] A smaller 



nucleus within the nucleus. 

 Nu'cleus, pi. Nu'clei. [Lat. a " kernel."] A minute vesicle embedded 



in the cell protoplasm (cytoplasm). 

 Nutri'tion. [From the Lat. nu'trio, to " nourish."] The processes by 



which the nourishment of the body is accompUshed. 



Occip'ital. [From the Lat. occiput, occipitis, the " back of the head."] 



Pertaining to the occiput, the back part of the head. 

 Odon'toid. [From the Gr. odous, odontos, a " tooth," and eidos, " form," 



" resemblance."] Tooth-like. 

 (Ede'ma. [From the Gr. aided, to " swell."] A swelling from effusion of 



serous fluid into the areolar tissue. 

 (Esoph'agus. [Gr. oisophagos, from oiso (fut. of oio) to " carry," and 



phagein, " to eat."] The gullet. 

 Olec'ranon. [From the Gr. 6le7ie, the " elbow," and kranion, the 



" head." The head of the elbow. 

 Olfac'tory. [From the Lat. olfacio, olfactum, to " smell."] Belonging to 



the sense of smell. 

 Omen'tum. [Lat. " coverlet."] A dupUcature of the peritoneum, which 



hangs in front of the intestines. 

 Ophthal'mic. [From the Gr. ophthalmos, the " eye."] Belonging to the eye. 

 ^ Op'sonins. [From the Gr. opsono, " prepare food for."] A name given to 



chemical substances found in blood plasma which make microbes 



more susceptible to phagocytes. 

 Op'tic. [From the Gr. opsis, " sight."] That which relates to sight. 

 Orbicula'ris. [From dim. of Lat. orbis, an " orb," or " circle."] Name 



of the circular muscles. 

 Or'bital. [From the Lat. orbita, a " track," " rut of a wheel."] Pertain- 

 ing to the orbit, the bony ca\'ity in which the eyeball is suspended. 



