noun
1. : a variable color averaging a light greenish blue that is bluer and paler than average turquoise (sense 2a) or average turquoise blue and bluer and deeper than average aqua blue — compare robin's egg
2. : a light bluish green that is greener and duller than average aqua green (sense 1) and greener and paler than average turquoise green — called also bird's-egg green, eggshell blue