Hydra

small tubular solitary freshwater hydrozoan polyp

Hydra

a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer

Hydra

(Greek mythology) monster with nine heads

Hydra

an antihypertensive drug (trade name Apresoline) that dilates blood vessels

Hydra

an abnormality of pregnancy

Hydra

any of various deciduous or evergreen shrubs of the genus Hydrangea

Hydra

deciduous climber with aerial roots having white to creamy flowers in fairly flat heads

Hydra

deciduous shrub with creamy white flower clusters

Hydra

sometimes included in the family Saxifragaceae

Hydra

deciduous shrub bearing round-headed flower clusters opening green and aging to pink or blue

Hydra

deciduous shrub or small tree with pyramidal flower clusters

Hydra

deciduous climber with aerial roots having large flat flower heads