aqua

Etymology

From Middle English aqua (“water”), borrowed from Latin aqua. Perhaps also a learned borrowing directly from Latin. Doublet of ea, Eau, eau, and yeo.

noun

1. (inorganic chemistry) The compound water.
2. A shade of colour, usually a mix of blue and green similar to the colour turquoise.
   aqua:
   Ms. Rockburne, with help from a team of artists, is working on a gargantuan mural of deep blues, shimmering aquas and luminous gold leaf that is headed for the American Embassy in Kingston, Jamaica. June 27, 2009, Patricia Cohen, “Employing Art Along With Ambassadors”, in New York Times

adj

1. Of a greenish-blue colour.