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4 definitions found
 for Opal
From The Collaborative International Dictionary of English v.0.48 :

  Opal \O"pal\, n. [L. opalus: cf. Gr. ?, Skr. upala a rock,
     stone, precious stone: cf. F. opale.] (Min.)
     A mineral consisting, like quartz, of silica, but inferior to
     quartz in hardness and specific gravity.
     [1913 Webster]
     Note: The precious opal presents a peculiar play of colors
           of delicate tints, and is highly esteemed as a gem. One
           kind, with a varied play of color in a reddish ground,
           is called the harlequin opal. The fire opal has
           colors like the red and yellow of flame. Common opal
           has a milky appearance. Menilite is a brown impure
           variety, occurring in concretions at Menilmontant, near
           Paris. Other varieties are cacholong, girasol,
           hyalite, and geyserite.
           [1913 Webster]

From WordNet (r) 3.0 (2006) :

      n 1: a translucent mineral consisting of hydrated silica of
           variable color; some varieties are used as gemstones

From The Free On-line Dictionary of Computing (30 December 2018) :

     1. A DSP language.
     ["OPAL: A High Level Language and Environment for DSP boards
     on PC", J.P. Schwartz et al, Proc ICASSP-89, 1989].
     2. The language of the object-oriented database GemStone.
     ["Making Smalltalk a Database System", G. Copeland et al, Proc
     SIGMOD'84, ACM 1984, pp.316- 325].
     3. A simulation language with provision for stochastic
     variables.  An extension of Autostat.
     ["C-E-I-R OPAL", D. Pilling, Internal Report,
     C.E.I.R. Ltd. (1963)].
     4. A language for compiler testing said to be used internally
     by DEC.
     5. A functional programming language designed at the
     Technische Universitaet Berlin as a testbed for the
     development of functional programs.  OPAL integrates
     concepts from Algebraic Specification and Functional
     Programming, which favour the (formal) development of (large)
     production-quality software written in a purely functional
     The core of OPAL is a strongly typed, higher-order,
     strict applicative language which belongs to the tradition
     of Hope and ML.  The algebraic flavour of OPAL is visible
     in the syntactical appearance and in the preference of
     parameterisation to polymorphism.
     OPAL supports: information hiding - each language unit is
     divided into an interface (signature) and an implementation
     part; selective import; parameterised modules; free
     constructor views on sorts, which allow pattern-based
     function definitions despite quite different implementations;
     full overloading of names; puristic scheme language with no
     built-in data types (except Booleans and denotations).
     OPAL and its predecessor OPAL-0 have been used for some time
     at the Technische Universitaet Berlin in CS courses and for
     research into optimising compilers for applicative languages.
     The OPAL compiler itself is writte entirely in OPAL.
     An overview is given in "OPAL: Design And Implementation of an
     Algebraic Programming Language".

From U.S. Gazetteer Places (2000) :

  Opal, WY -- U.S. town in Wyoming
     Population (2000):    102
     Housing Units (2000): 48
     Land area (2000):     0.430749 sq. miles (1.115636 sq. km)
     Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
     Total area (2000):    0.430749 sq. miles (1.115636 sq. km)
     FIPS code:            57810
     Located within:       Wyoming (WY), FIPS 56
     Location:             41.770449 N, 110.325918 W
     ZIP Codes (1990):    
     Note: some ZIP codes may be omitted esp. for suburbs.
      Opal, WY

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