A transparent blue-green variety of beryl, used as a gemstone.(noun)
A pale blue to light greenish blue.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "aquamarine" in a sentence
"Her hands were wide and extremely strong looking; one thumbnail was rimmed in aquamarine blue, and the other wrist had a faint smudge of yellow."
"She had hair of wavy gold, a white brow, eyes of a colour never seen but in the precious stone called aquamarine, cheeks of rose, a nose straight and finely cut."
"Its seat was in her eyes, which many thought not at all beautiful, for they were like those gems called aquamarine, of a puzzling tint varying from blue to green, lustrous and lapping the beholder with their gentle lambency, except when passion moved her, when I have seen them glow with a menacing light as though they might shoot forth green flames."