{Emerald fish} (Zo["o]l.), a fish of the Gulf of Mexico
({Gobionellus oceanicus}), remarkable for the brilliant
green and blue color of the base of the tongue; -- whence
the name; -- called also {esmeralda}.
{Emerald green}, a very durable pigment, of a vivid light
green color, made from the arseniate of copper; green
bice; Scheele's green; -- also used adjectively; as,
emerald green crystals.
{Emerald Isle}, a name given to Ireland on account of the
brightness of its verdure.
{Emerald spodumene}, or {Lithia emerald}. (Min.) See
{Hiddenite}.
{Emerald nickel}. (Min.) See {Zaratite}.