hydrated

American

[hahy-drey-tid] / ˈhaɪ dreɪ tɪd /

adjective

chemically combined with water in its molecular form.
(of paper pulp) beaten until gelatinous for making into water-resistant paper.

hydrated British

/ ˈhaɪdreɪtɪd /

adjective

(of a compound) chemically bonded to water molecules

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

nonhydrated adjective
unhydrated adjective

Etymology

Origin of hydrated

First recorded in 1800–10; hydrate + -ed ²

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The findings indicate that volcanic heat at the Juventae Plateau and geothermal energy beneath Aram Chaos could convert common hydrated sulfates into ferric hydroxysulfate.

From Science Daily • Mar. 10, 2026

Stay hydrated, touch grass, see your friends, tell the people you love that you love them.

From Salon • Mar. 8, 2026

Anisimova, beaten finalist last year at Wimbledon and the US Open, said keeping hydrated the day before and on match day was crucial.

From Barron's • Jan. 24, 2026

Instead, Prof Smith says the best approach is for people to "wait it out", drink water to stay hydrated and take lozenges that encourage swallowing and "inhibit a cough" for a period of time.

From BBC • Dec. 3, 2025

“Be smart—stay hydrated and keep your fuel up.”

From "The Running Dream" by Wendelin Van Draanen

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023