aq·ua·ma·rine 
(ăk′wə-mə-rēn, ä′kwə-)
(ăk′wə-mə-rēn, ä′kwə-)n.
1. A transparent blue-green variety of beryl, used as a gemstone.
2. A pale blue to light greenish blue.
[Latin aqua marīna, seawater : aqua, water; see AQUA + marīna, feminine of marīnus, of the sea; see MARINE.]