1.  aquamarine(n = noun.substance) - a transparent variety of beryl that is blue green in color;
is a kind of beryl, transparent gem

2.  aquamarine(n = noun.attribute) aqua, cobalt blue, greenish blue, peacock blue, turquoise - a shade of blue tinged with green;
is a kind of blue, blueness

   A transparent, pale green variety of beryl, used as a gem. See Beryl. [1913 Webster]

aquamarine, n.
1 a light bluish-green beryl.
2 its colour.

Etymology:
L aqua marina sea water

N  greenness, green, blue and yellow, vert, emerald, verd antique, verdigris, malachite, beryl, aquamarine, absinthe, cr=eme de menthe, terre verte, verditer, verdine, copperas, greenness, verdure, viridity, viridescence, verditure, glaucoma, rokunaisho, green, verdant, glaucous, olive, olive green, green as grass, verdurous, emerald green, pea green, grass green, apple green, sea green, olive green, bottle green, coke bottle green, greenish, virent, virescent, green (learner), new, inexperienced, novice, (unskillful), green (ill, sick), green with envy, the green grass of Ireland, the wearing of the green.