undersea

(redirected from underseas)
Also found in: Dictionary, Thesaurus.

undersea

(ŭn′dər-sē′)
adj.
Existing or used beneath the surface of the sea: undersea life; undersea cameras.
adv. undersea (ŭn′dər-sē′) also underseas (-sēz′)
Beneath the surface of the sea.