171 



Hydatid. A vesicular formation, generally considered to 

 be an animal parasite^ found in various organs, causing 

 their distention into cysts or tumors. 



Hydremia. A watery condition of the blood. 



Hydragogue. Causing watery discharges. 



Hydraulics. The mechanics of liquids ; investigating 

 especially the force and phenomena of liquid pressure 

 and movement. 



Hydrocephalus. Dropsy of the head. 



Hydro-pneumothorax. The presence of water and air 

 together, in the cavity of the pleura. 



Hydrothorax. Water in the chest : thoracic dropsy. 



Hygiene. The science of health. 



Hygrometry. The measurement of the amount of moist- 

 ure in the air. 



Hyper^m^sthesia. Excess of blood in a part, with irrita- 

 bility ; commonly called chronic inflammation. 



Hyperemia. Excess of blood in a part. 



HvpERiESTHESiA. Over-sensitiveiiess. 



Hyperinosis. Excess of fibrin. 



Hypertrophy. Over-growth. 



Hypnotic. Promotive of sleep. 



Hypochondriac. In aiiatomy, the region over the liver, and 

 the corresponding region on the left side. In medicine^ 

 a person affected with depression of spirits from dys- 

 peptic disease. 



Hypochondriasis. Dyspepsia with lowness of spirits and 

 imaginary complaints. 



Hypogastric. Below the stomach. 



Hypostatic. The result of settling or gravitative deposi- 

 tion. 



I 



ICHORiEMiA. Contamination of the blood ; pyaemia. 



Icterus. Jaundice. 



IcTHYOSis. Fish-skin disease. 



Idiopathic. Primary ; independent. 



Idiosyncrasy. Individual peculiarity of system. 



Ileus. Iliac passion. The most violent form of colic. 



Impetigo. A pustular eruption. 



