hygroscope
- n hygrometer that shows variations in the relative humidity of the atmosphere
hygroton
- n a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks
hygrotrama
- n a genus of fungi belonging to the family Hygrophoraceae
hygrotrama foetens
- n a small grey-brown fungus with an unpleasant odor of mothballs
hyla arenicolor
- n a small chiefly ground dweller that stays within easy jumping distance of water; of United States southwest and northern Mexico
hyla crucifer
- n a small brown tree toad having a shrill call heard near wetlands of eastern United States and Canada in early spring
hyla regilla
- n the most commonly heard frog on the Pacific coast of America
hylactophryne augusti
- n of southwest United States and Mexico; call is like a dog's bark
hylobates lar
- n smallest and most perfectly anthropoid arboreal ape having long arms and no tail; of southern Asia and East Indies
hylobates syndactylus
- n large black gibbon of Sumatra having the 2nd and 3rd toes partially united by a web
hylobatidae
- n used in some classifications for the lesser apes (gibbons and siamangs); sometimes considered a subfamily of Pongidae