WordReference Random House Unabridged Dictionary of American English © 2025
hy•dro•scope
(hī′drə skōp′),USA pronunciation n.
hy•dro•scop•ic
(hī′drə skop′ik),USA pronunciation hy′dro•scop′i•cal, adj.
hy•dro•sco•pic•i•ty
(hī′drə skō pis′i tē),USA pronunciation n.
- Opticsan optical device for viewing objects below the surface of water.
- 1670–80; hydro-1 + -scope