Not to be confused with “aquarius”, as my esteemed coworker did. And, after much debate, pronounced with a long-voweled ‘a’.
Aqueous |ˈākwēəs, ˈak-| (Adjective)
of or containing water, typically as a solvent or medium: an aqueous solution of potassium permanganate.
• like water; watery: a great hall of aqueous marble.
ORIGIN mid 17th cent.: from medieval Latin aqueus, from Latin aqua ‘water.’
Credit for all Word of the Week definitions goes to the built-in dictionary on my Macbook. Dictionary, you’re my friend.