328 GLOSSARY 



Di'a-phragm (Greek diaphragma, partition), a large, circular muscle 

 separating the chest from the abdomen. 



Dif-fu'sion (Latin dis, in different directions, and///;/ dere, to spread), 

 a spreading or flowing of a liquid or gas in all directions. 



Di-ges'tion (Latin di-, in all directions, and get'o, gestu s, I bear), the 

 conversion of food into a state suitable for absorption into 

 the blood. 



Diph-the'ri-a (Greek diphthera, membrane), a dangerous disease of 

 the throat, and sometimes extending into the oesophagus, the 

 larynx, and trachea. 



Dis-in-fect'ants, agencies used to destroy germs of diseases. 



Dor'sal (Latin dor sum, back), pertaining to the back. 



Ef fer-ent (Latin e, out, andferetis, bringing), conveying outward or 

 away from an organ. 



Ef-flu'vi-a (Latin e, out, andflttere, to flow), subtile or invisible par- 

 ticles given off by all substances that have an odor. 



E-lim'i-na'tion (Latin eliininare, eHtninatus, to put forth from the 

 threshold), the process of discharging waste products or 

 foreign substances through the various organs of excretion. 



E-mul'si-fy (Latin e, out, and mulgere, mulsus, to milk), to reduce 

 from an oily to a milky substance in which the fat particles 

 are in a very finely divided state, giving it the appearance of 

 solution. 



En-am'el, the very hard tissue covering the crown of the teeth. 



En' do-lymph (Greek endo, within, and lympha, water), the watery 

 fluid contained in the membranous labyrinth of the internal 

 ear. 



En-dos'te-um (Greek endo, within, and osteon, bone), the membrane 

 lining the hollow cavity of a bone. 



Ep'i-der'mis (Greek ept, upon, and derma, skin), the outer layer of 

 the skin, commonly called the scarf-skin. 



Ep'i-glot'tis (Greek epi, upon, andgfotta, tongue), the cartilage cov- 

 ering the opening into the larynx during the act of swallowing. 



Ep'i-the'li-al (Greek epi, upon, and thele, wart or nipple), the outer 

 layer of cells in the skin and mucous membranes. 



Eth'moid (Greek ethmos, sieve, and -oid, like), a sievelike bone form- 

 ing the roof of the nose. 



Eu-sta'chi-an tube (named from Eustachio, a noted Italian physician), 

 a small tube leading from the pharynx to the middle ear. 



