hydrocarbon
- n an organic compound containing only carbon and hydrogen
hydrocele
- n disorder in which serous fluid accumulates in a body sac (especially in the scrotum)
hydrocephalus
- n an abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological
hydrocephaly
- n an abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological
hydrocharidaceae
- n simple nearly stemless freshwater aquatic plants; widely distributed
hydrocharis morsus-ranae
- n European floating plant with roundish heart-shaped leaves and white flowers
hydrocharitaceae
- n simple nearly stemless freshwater aquatic plants; widely distributed
hydrochloric acid
- n an aqueous solution of hydrogen chloride; a strongly corrosive acid
hydrochloride
- n a complex consisting of an organic base in association with hydrogen chloride
hydrochlorofluorocarbon
- n a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere
hydrochlorothiazide
- n a diuretic drug (trade name Microzide, Esidrix, and HydroDIURIL) used in the treatment of hypertension
hydrochoerus hydrochaeris
- n pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent