- occurring, appearing, formed, or used under water
WordReference Random House Unabridged Dictionary of American English © 2026
sub•a•que•ous
(sub ā′kwē əs, -ak′wē-),USA pronunciation adj.
- existing or situated under water;
underwater. - occurring or performed under water.
- used under water.
- sub- + aqueous 1670–80
Collins Concise English Dictionary © HarperCollins Publishers::
subaqueous /sʌbˈeɪkwɪəs; -ˈækwɪ-/ adj
'subaqueous' also found in these entries (note: many are not synonyms or translations):