hydro-, hydra-, hydr-, hyd-

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.

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.

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.

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.

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.

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.