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The Collaborative International Dictionary of English v.0.48 (gcide)

Beryl \Ber"yl\ (b[e^]r"[i^]l), n. [F. b['e]ryl, OF. beril, L.
beryllus, Gr. bh`ryllos, prob. fr. Skr. vai[dsdot][=u]rya.
Cf. {Brilliant}.] (Min.)
A mineral of great hardness, and, when transparent, of much
beauty. It occurs in hexagonal prisms, commonly of a green or
bluish green color, but also yellow, pink, and white. It is a
silicate of aluminum and beryllium. The {aquamarine} is a
transparent, sea-green variety used as a gem. The {emerald}
is another variety highly prized in jewelry, and
distinguished by its deep color, which is probably due to the
presence of a little oxide of chromium.
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Emerald \Em"er*ald\, n. [OE. emeraude, OF. esmeraude, esmeralde,
F. ['e]meraude, L. smaragdus, fr. Gr. ?; cf. ?kr. marakata.]
1. (Min.) A precious stone of a rich green color, a variety
of beryl. See {Beryl}.
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2. (Print.) A kind of type, in size between minion and
nonpare?l. It is used by English printers.
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Emerald \Em"er*ald\, a.
Of a rich green color, like that of the emerald. "Emerald
meadows." --Byron.
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{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}.
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