aqueous

adjective

aque·​ous ˈā-kwē-əs  ˈa- 

1

a

: of, relating to, or resembling water

b

: made from, with, or by water

an aqueous solution

2

medical : of or relating to the aqueous humor

Examples of aqueous in a Sentence

Recent Examples on the Web

In testing, the setup produced a pure aqueous formic acid solution under real sunlight, even as the light intensity changed. — New Atlas, 21 June 2026

In order to have aqueous alteration there needs to be some internal heating [usually via radioactive elements] and if something forms later than everything else then there will be less heat [since many of the radioactive elements will have already decayed]. — Keith Cooper, Space.com, 19 June 2026

There is no one in sight, but the surface of the water bursts with evidence of someone having just dived in, disappearing into the cool aqueous depths. — Rebecca Mead, New Yorker, 16 June 2026

Researchers in South Korea have developed a new electrolyte additive that significantly improves the lifespan and capacity of aqueous batteries, a technology widely viewed as a safer and lower-cost alternative to lithium-ion batteries. — Neetika Walter, Interesting Engineering, 10 June 2026

Word History

Etymology

Medieval Latin aqueus, from Latin aqua

First Known Use

1646, in the meaning defined at sense 1a

Phrases Containing aqueous

• aqueous humor

Rhymes for aqueous

• nonaqueous
• subaqueous

Kids Definition

aqueous

adjective

aque·​ous ˈā-kwē-əs  ˈak-wē- 

1

a

: of, relating to, or resembling water

b

: made from, by, or with water

an aqueous solution

2

: of or relating to the aqueous humor

Medical Definition

aqueous

1 of 2 adjective

aque·​ous ˈā-kwē-əs  ˈak-wē- 

1

a

: of, relating to, or resembling water

an aqueous vapor

b

: made from, with, or by water

an aqueous solution

2

: of or relating to the aqueous humor

aqueous

2 of 2 noun

: aqueous humor