hexenbesen
- n an abnormal tufted growth of small branches on a tree or shrub caused by fungi or insects or other physiological disturbance
hexestrol
- n estrogen compound used to treat menstrual irregularities and menopausal symptoms and to prevent pregnancy
hexose
- n a monosaccharide that contains six carbon atoms per molecule
heyerdahl
- n Norwegian anthropologist noted for his studies of cultural diffusion (1914-2002)
heyrovsky
- n Czechoslovakian chemist who developed polarography (1890-1967)
hezbollah
- n a Shiite terrorist organization with strong ties to Iran; seeks to create an Iranian fundamentalist Islamic state in Lebanon; car bombs are the signature weapon
hezekiah
- n (Old Testament) king of Judah who abolished idolatry (715-687 BC)
hf
- n a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
- n 3 to 30 megahertz
hfc
- n a fluorocarbon emitted as a by-product of industrial manufacturing
hg
- n a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
- n 100 grams