subaqueous > define

adjective

• Growing or remaining under water.
  • usage: "viewing subaqueous fauna from a glass-bottomed boat"; "submerged leaves"
  • synonyms: subaquatic, submerged, submersed, underwater

• (a.) Formed in or under water; as, subaqueous deposits.
• (a.) Being under water or beneath the surface of water; adapted for use under water; submarine; as, a subaqueous helmet.