hydra
— Noun
– English
～ small tubular solitary freshwater hydrozoan polyp
hydra
— Noun
– English
～ trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality; "we may be facing a hydra that defies any easy solution"
Hydra
— Noun
– English
～ (Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones; "Hydra was slain by Hercules"
Hydra
— Noun
– English
～ a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
hydralazine
— Noun
– English
～ an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure
hydramnios
— Noun
– English
～ an abnormality of pregnancy; accumulation of excess amniotic fluid
hydrangea
— Noun
– English
～ any of various deciduous or evergreen shrubs of the genus Hydrangea
Hydrangea arborescens
— Noun
– English
～ deciduous shrub with creamy white flower clusters; eastern United States
Hydrangea anomala
— Noun
– English
～ deciduous climber with aerial roots having white to creamy flowers in fairly flat heads
hydrangea family
— Noun
– English
～ sometimes included in the family Saxifragaceae
Hydrangeaceae
— Noun
– English
～ sometimes included in the family Saxifragaceae
hydrant
— Noun
– English
～ a discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks
hydrant
— Noun
– English
～ a faucet for drawing water from a pipe or cask
hydrargyrum
— Noun
– English
～ a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
hydrarthrosis
— Noun
– English
～ inflammation and swelling of a movable joint because of excess synovial fluid
Hydrastis
— Noun
– English
～ small genus of perennial herbs having rhizomes and palmate leaves and small solitary flowers; of northeastern United States and Japan
Hydrastis Canadensis
— Noun
– English
～ perennial herb of northeastern United States having a thick knotted yellow rootstock and large rounded leaves
hydrate
— Verb
– English
～ cause to be hydrated; add water or moisture to; "hydrate your skin"