1. [n]  the green color of an emerald
2. [n]  a transparent piece of emerald that has been cut and polished and is valued as a precious gem
3. [n]  a green transparent form of beryl; highly valued as a gemstone

1. \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}.
   
   2. (Print.) A kind of type, in size between minion and
      nonpare?l. It is used by English printers.
   
   Note: [hand] This line is printed in the type called emerald.
   
   

2. \Em"er*ald\, a.
   Of a rich green color, like that of the emerald. ``Emerald
   meadows.'' --Byron.
   
   {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}.
   
   

An object-oriented distributed programming language and environment developed at the university of washington in the early 1980s. Emeral was the successor to epl. It is strongly typed and uses signatures and prototypes rather than inheritance.

["Distribution and Abstract Types in Emerald", A. Black et al, IEEE Trans Soft Eng SE-13(1):65-76 (Jan 1987)].

Heb. nophek (Ex. 28:18; 39:11); i.e., the "glowing stone", probably the carbuncle, a precious stone in the breastplate of the high priest. It is mentioned (Rev. 21:19) as one of the foundations of the New Jerusalem. The name given to this stone in the New Testament Greek is smaragdos, which means "live coal."