sub·aque·ous /-ˈekwiəs, ˈæ-/
  (a.)水中的,水下用的
  Sub·a·quat·ic Sub·a·que·ous a.
  1. Being under water, or beneath the surface of water; adapted for use under water; submarine; as, a subaqueous helmet.
  2. Geol. Formed in or under water; as, subaqueous deposits.
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  subaqueous
       adj : growing or remaining under water; "viewing subaqueous fauna
             from a glass-bottomed boat"; "submerged leaves" [syn: subaquatic,
              submerged, submersed, underwater]