WordReference Random House Unabridged Dictionary of American English © 2026
hy•dro•col•loid
(hī′drə kol′oid),USA pronunciation n.
hy•dro•col•loi•dal
(hī′drō kə loid′l),USA pronunciation adj.
- Chemistrya substance that forms a colloid when combined with water.
- 1925–30; hydro-1 + colloid