hydrophyllum virginianum
- n showy perennial herb with white flowers; leaves sometimes used as edible greens in southeastern United States
hydrophyte
- n a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
hydrophytic plant
- n a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
hydroplane
- n an airplane that can land on or take off from water
the designer of marine aircraft demonstrated his newest hydroplane - n a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds
the museum houses a replica of the jet hydroplane that broke the record - v glide on the water in a hydroplane
hydroponics
- n a technique of growing plants (without soil) in water containing dissolved nutrients
hydrops
- n swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities
hydrosphere
- n the watery layer of the earth's surface; includes water vapor
hydrostatic head
- n the pressure at a given point in a liquid measured in terms of the vertical height of a column of the liquid needed to produce the same pressure
hydrostatics
- n study of the mechanical properties of fluids that are not in motion
hydrotherapy
- n the internal and external use of water in the treatment of disease
hydrothorax
- n accumulation of fluid in the pleural cavity (the space between the lungs and the walls of the chest) often resulting from disease of the heart or kidneys
hydroxide
- n a compound of an oxide with water
- n a chemical compound containing the hydroxyl group
hydroxide ion
- n the anion OH having one oxygen and one hydrogen atom