hydro-, hydra-, hydr-, hyd-

(Greek: water)

1. An abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological.
2. An increased quantity of cerebrospinal fluid (CSF) inside the brain that can result in increased pressure.

It is often the result of a disturbance (obstruction) in the normal cerebrospinal fluid (CSF) circulation or the over-production of CSF.

The diagnostic signs and symptoms of hydrocephalus depend upon the age of the person:

  1. In infants the most obvious sign of hydrocephalus is usually an abnormally large head. (That is one reason a baby's head should be measured at every well-baby visit). Symptoms of hydrocephalus in an infant may include vomiting, sleepiness, irritability, an inability to look upwards, and seizures.
  2. In older children and adults there is no head enlargement from hydrocephalus, but symptoms may include headache, nausea, vomiting and, sometimes, blurred vision. There may be problems with balance, delayed development in walking or talking, and poor coordination.
hydrochore (s) (noun), hydrochores (pl)
1. Dispersed by the agency of water; such as, floating seeds, fruits, or vegetable parts: Mangrove trees utilize hydrochores as a means of reproducing because they live in water and when their seeds fall down, they grow roots as soon as they touch any kind of soil.

During low tides, these processes of hydrochores might fall in soil instead of water and start growing right where they fall; however, if the water level is high, they can be carried far away from where they fell.

2. A dependence on water for dissemination.
The study and therapeutic utilization of waterfront climates.
hydrocole (verb), hydrocoles; hydrocoled; hydrocoliong: swamps, marshes
Living in swamps, marshes, or other wet habitats or environments.
An elastic water-based impression material.
An aquatic plant living on or in the water.
A refracting device linked to the cornea with fluid, with the intent of subtracting the optical characteristics of the cornea from the refractive findings.
Correction of retinal detachment.
1. Colonies consist of large numbers of cylindrical cells joined terminally with two others to form an open net-like structure.
2. A green freshwater alga; waternet.
hydrodiffusion (s) (noun), hydrodiffusions (pl)
1. The diffusion of a substance through water.
2. The diffusion of one liquid through another liquid.
A craving for water.
An epileptic condition characterized by attacks of uncontrollable or insatiable thirst.
1. Relating to the mechanical properties of liquids.
2. Operated by a moving liquid.
1. Fluid dynamics applied to liquids; such as, water, alcohol, oil, and blood.
2. The branch of science that deals with the dynamics of fluids; especially, incompressible fluids, in motion.
3. The dynamics of fluids in motion.
4. The branch of fluid dynamics that deals with liquids, including hydrostatics and hydrokinetics. Also called hydromechanics.
5. A branch of physics that deals with the motion of fluids and the forces acting on solid bodies immersed in fluids and in any motion relative to them.

The science of mechanics which relates to fluids or which deals with the laws of motion and action of nonelastic fluids, whether as investigated mathematically, or by observation and experiment; the principles of dynamics, as applied to water and other fluids.

The word is sometimes used as a general term, including both hydrostatics and hydraulics, together with pneumatics and acoustics.

Measuring the forces exerted by fluids in motion.

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