'submersible' definitions:

Definition of 'submersible'

(from WordNet)
adjective
Capable of being immersed in water or functioning while submerged; "a submersible pump"; "a submergible electric frying pan" [syn: submersible, submergible] [ant: nonsubmergible, nonsubmersible]
noun
An apparatus intended for use under water
noun
A warship designed to operate under water [syn: submersible, submersible warship] [ant: surface ship]