Dictionary.com
definitions

hydrogel

[hahy-druh-jel]

noun

a gel whose liquid constituent is water.

Origin of hydrogel

First recorded in 1890–95; hydro-1 + gel
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for hydrogel

hydrogel

noun

a gel in which the liquid constituent is water
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
hydrogel in Medicine

hydrogel

[hī′drə-jĕl′]

n.

A colloidal gel in which the particles are dispersed in water.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.