tetrahydrate

[te-truh-hahy-dreyt]

noun Chemistry.

a hydrate that contains four molecules of water, as potassium sodium tartrate, KNaC4H4O6·4H2O.

Origin of tetrahydrate

First recorded in 1885–90; tetra- + hydrate
Related formstet·ra·hy·drat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019