Em″er‐ald, a. Of a rich green color, like that of the emerald. “Emerald meadows.” Byron.
Emerald fish(Zoöl.), 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, orLithia emerald. (Min.) See Hiddenite. — Emerald nickel. (Min.) See Zaratite.