1. Aqua-Lung

noun. a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus.

Rhymes with Aqua Fortis

• portis
• mortis
• courtis

2. aqua

noun. ['ˈækwə, ˈɑːkwə'] a shade of blue tinged with green.