hydrated

UK: /ˈhaɪdreɪtɪd/ US: (hī′drā tid)

From the verb hydrate: (⇒ conjugate)

hydrated is: ⓘ

v past

v past p

WordReference Random House Unabridged Dictionary of American English © 2025

hy•drat•ed  (hī′drā tid), adj. 

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

• hydrate + -ed² 1800–10

Collins Concise English Dictionary © HarperCollins Publishers::

hydrated / ˈhaɪdreɪtɪd/ adjective

1. (of a compound) chemically bonded to water molecules

WordReference Random House Unabridged Dictionary of American English © 2025

hy•drate  (hī′drāt), n., v., -drat•ed, -drat•ing. 
n. 

1. Chemistry any of a class of compounds containing chemically combined water. In the case of some hydrates, as washing soda, Na₂CO₃·10H₂O, the water is loosely held and is easily lost on heating;
   in others, as sulfuric acid, SO₃·H₂O, or H₂SO₄, it is strongly held as water of constitution.

v.t., v.i. 

2. Chemistry to combine chemically with water.

• hydr-¹ + -ate² 1795–1805

hy•dra′tion, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

hydrate / ˈhaɪdreɪt/ noun

1. a chemical compound containing water that is chemically combined with a substance and can usually be expelled without changing the constitution of the substance
2. (not in technical usage) a chemical compound, such as a carbohydrate, that contains hydrogen and oxygen atoms in the ratio two to one

verb

1. to undergo or cause to undergo treatment or impregnation with water

Etymology: 19th Century: from hydro- + -ate¹

hyˈdration noun

ˈhydrator noun