GLOSSARY. 251 



Dial'ysis. [From the Gr. dialyo, to " dissolve."] Separation of liquids by 

 membranes. 



Diapede'sis. [From the Gr. dia, " through," and pedao, to " leap," to " go."] 

 Passing of the blood-corpuscles through vessel walls without rupture: 

 sweating of blood. 



Di'aphragm. [From the Gr. diaphrasso, to "divide in the middle by a parti- 

 tion."] The partition muscle dividing the cavity of the chest from that 

 of the abdomen. 



Diarthro'sis. [From the Gr. dia, " through," as implying no impediment, 

 and arthron, a "joint."] A freely movable articulation. 



Dias'tole. [From the Gr. diastello, to "dilate."] The dilation of the heart. 



Dip'loe. [From the Gr. diploo, to "double," to "fold."] The osseous tissue 

 between the tables of the skull. 



Dis'cus Prolig'erous, or germ disk. A term applied to a mass of cell cling- 

 ing to the ovum when it is set free from the ovary. 



Dis'tal. [From the Lat. dis, " apart," and sto, to " stand."] Away from the 

 centre. 



Dor' sal. [From the Lat. dorsum, the "back."] Pertaining to the back or 

 posterior part of an organ. 



Duc'tus Arterio'sus. [Lat.] Arterial duct. 



Duc'tus Veno'sus. [Lat.] Venous duct. 



Duode'num. [From the Lat. duodeni, "twelve each."] First part of small 

 intestines, so called because about twelve fingers' breadth in length. 



Du'ra Ma'ter. [Lat.] The "hard mother," called dura because of its great 

 resistance, and mater because it was formerly believed to give rise to 

 every membrane of the body. The outer membrane of the brain and 

 spinal cord. 



Dyspnce'a. [From the Gr. dys, "difficult," and pneo, to "breathe."] -Diffi- 

 cult breathing. 



Efferent. [From the Lat. effero, to " carry out."] Bearing or carrying out- 

 wards, as from the centre to the periphery. 



Elimination. [From the Lat. e, " out of," and limen, liminis, a "threshold."] 

 The act of expelling waste matters. Eliminate signifies, literally, to 

 throw out of doors. 



Em'bryo. The ovum and product of conception up to the fourth month, 

 when it becomes known as the foetus. 



Enarthro'sis. [From the Gr. en, "in," and arthron, a "joint."] An articu- 

 lation in which the head of one bone is received into the cavity of 

 another, and can be moved in all directions. 



Endocardium. [From the Gr. endon, "within, "and kardia, the "heart."] 

 The lining membrane of the heart. 



En'dolymph. [From the Gr. endon, "within," and Lat. lympha, "water."] 

 The fluid in the membranous labyrinth of the ear. 



En'siform. [From the Lat. ensis, a "sword," and forma, "form."] Shaped 

 like a sword. 



Ep'iblast. [From the Gr. epi, "upon," and blastos, a "germ," or "sprout."] 

 The external or upper layer of the germinal membrane. 



