| HYD | leathery-leaved tree of western India bearing round fruits with brown densely-hairy rind enclosing oily pulp that yields hydnocarpus oil |
|---|---|
| HYD | a family of flowering plants in Africa and Argentina that are parasitic on the roots of other plants |
| HYD | type genus of Hydnaceae |
| HYD | small tubular solitary freshwater hydrozoan polyp |
| HYD | a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer |
| HYD | (Greek mythology) monster with nine heads |
| HYD | an antihypertensive drug (trade name Apresoline) that dilates blood vessels |
| HYD | an abnormality of pregnancy |
| HYD | any of various deciduous or evergreen shrubs of the genus Hydrangea |
| HYD | deciduous climber with aerial roots having white to creamy flowers in fairly flat heads |
| HYD | deciduous shrub with creamy white flower clusters |
| HYD | sometimes included in the family Saxifragaceae |