hydro-, hydra-, hydr-, hyd-

(Greek: water)

hydrophobophobia (s) (noun) (no plural)
An intense dread of acquiring rabies: Hydrophobophobia is a morbid condition produced by the horror of lyssa that can induce real or presumed symptoms similar to the disease itself.
An electroacoustic transducer for listening to sound transmitted through water; such as, detection of submarines by hydrophone and underwater seismic surveying by hydrophone.
A stone canal that carries water.
1. An apparatus for measuring the pressure or flow of a fluid.
2. An instrument for recording the flow or pressure of a fluid; e.g., the flow of urine or the pressure of spinal fluid.
A description of the pressure and the flow of fluids; such as, the pressure of the spinal fluid or the flow of urine.
A transparent body partly covering the spore sacs of siphonophoran coelenterates.
1. A plant that grows in water or in saturated soil.
2. A plant requiring large amounts of water for growth; also, hygrophyte.
3. A plant that grows partly or completely underwater.
A written description of aquatic plants.
1. A small, light boat designed to operate at high speed on the surface of the water.
2. A hydrofoil designed to provide lift for an aircraft while skimming the surface of the water.
A reference to a vehicle, vehicle tire, etc., to skid on the film of water of a wet surface (usually a street after a rain) with a resulting decrease in automative control.
hydropneumatic (adjective) (not comparable)
Regarding something operated by both water and air power: Hydropneumatic methods connect the benefits of two technological principles, the hydraulic system and the pneumatic system.
hydropneumatosis (s) (noun) (no pl)
A condition characterized by the presence of fluid and gas within a tissue: Dr. Little diagnosed Peter as having a case of hydropneumatosis, which was a combination of emphysema and edema, an accumulation of gas and liquid in his body tissues.
hydroponicist, hydroponist (s) (noun), hydroponicists; hydroponists (pl)
Someone who is a specialist in hydroponics, that means growing plants without soil, in beds of sand, gravel, or similar supporting material flooded with nutrient solutions: Mr Green was a hydroponicist who was a specialist in the cultivation of plants in a nutritious water mixture instead of in soil.
hydroponics (s) (noun) (no pl)
The process of growing plants without soil: Hydroponics can take place in beds of sand, gravel, or similar supporting material flooded with nutrient solutions.

Hydroponics can also refer to the cultivation of plants in a nutrient liquid with or without gravel or another supporting medium.

hydroponicum (s) (noun) (no pl)
The building or garden, or farm in which plants are cultivated without the use of soil: Jill was interested in growing flowers and wanted to have a hydroponicum next to her house for growing them just by using a nutritional water mixture.

Cross references of word families that refer to "water": aqua-; hydat-; hygro-.