GLOSSARY 357 



Cor'ne-a (L. cor'nu, a horn). The transparent, horn-like substance which 



covers the anterior fifth of the eyeball. 

 Cor'pus-cles, Blood (L. dim. of cor'pus, a body). The small bi-concave 



discs which give to the blood its red color ; the white corpuscles are 



globular and larger. 

 Cos-met'ic (Gr. KOOT^W, kosmeo, to adorn). Beautifying ; applied to 



articles which are supposed to increase the beauty of the skin, etc. 

 Cra'ni-al (L. cra'nium, the skull). Pertaining to the skull. The nerves 



which arise from the brain are called cranial nerves. 

 Cri'coid (Gr. K/^KOS, kri'kos, a ring). A cartilage of the larynx resembling 



a seal-ring in shape. 

 Crys'tal-lme Lens (L. crystal' lum, a crystal). One of the so-called 



humors of the eye ; a double convex body situated in the front part of 



the eyeball. 

 Cu'ti-cle (L. dim. of cu'tis, the skin). The scarf-skin; also called the 



epider'mis. 

 Cu'tis (L. skin or hide). The true skin, lying beneath the cuticle ; also 



called the der'mis. 

 De-cus-sa'tion (L. decus'sis, the Roman numeral ten, X). A reciprocal 



crossing of fibres from side to side. 

 Di'a-phragm (Gr. 5ia(f>pd<T<rw, diaphrasso, to divide by a partition). A 



large, thin muscle which separates the cavity of the chest from the 



abdomen ; a muscle of respiration. 

 Dif-fu'sion of Gases. The power of gases to become intimately mingled, 



without reference to the force of gravity. 

 Duct (L. du'co, to lead). A narrow tube ; the thoracic duct is the main 



trunk of the absorbent vessels. 



Du-o-de'rium (L. duode'ni, twelve). The first division of the small intes- 

 tines, about twelve fingers' breadth long. 

 Du'ra Ma'ter (L.). Literally, the hard mother; the tough membrane 



which envelops the brain. 



Dys-pep'si-a (Gr. 5vs, dus, difficult, and TreTrrw, pepto, to digest). Diffi- 

 cult or painful digestion ; a disordered condition of the stomach. 

 E-mul'sion (L. emul'geo, to milk). Oil in a finely divided state sus- 

 pended in water. 

 En-am ' el (Fr. email}. The dense material which covers the crown of 



the tooth. 

 Endocardium (Gr. tvSo, endo, within, and KapSla, kardia, the heart. The 



lining membrane of the heart. 

 En'er-gy, Specific, of a Nerve. When a nerve of special sense is excited, 



whatever be the cause, the sensation experienced is that peculiar to 



the nerve ; this is said to be the law of the specific energy of the 



nerves. 

 Ep-i-glot'tis (Gr. tirl, epi, upon, and 7\wrrts, glottis, the entrance to the 



