Meaning & use

Hydrophobe

noun·Academic

Last updated

A substance or molecule that repels or does not mix with water.

See it in a sentence

Wax is a classic hydrophobe, causing rainwater to bead and roll off a freshly waxed car.

Chemists attach hydrophobe groups to one end of a surfactant molecule to help it interact with oils.

A note on using this word

Formed from Greek "hydro-" (water) and "-phobe" (fearing); in chemistry it is the direct counterpart of a "hydrophile," a water-attracting substance.

Words with a similar meaning

water-repellent substance

Choose a synonym to suit the sentence. Meanings can overlap without being identical.

Words with an opposite meaning

hydrophile

Another way to use it

2. noun

An archaic term for a person suffering from an abnormal fear of water, historically associated with rabies.

Nineteenth-century physicians once used "hydrophobe" to describe rabies patients who panicked at the sight of water.

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