Transcription
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- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
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- [oh-puh l]
- /ˈoʊ pəl/
- /ˈəʊ.pəl/
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- US Pronunciation
- US IPA
-
- [oh-puh l]
- /ˈoʊ pəl/
Definitions of opal word
- noun opal a female given name. 1
- noun opal A gemstone consisting of hydrated silica, typically semitransparent and showing varying colors against a pale or dark ground. 1
- noun opal iridescent gemstone 1
- noun Definition of opal in Technology 1. A DSP language. 2. The language of the object-oriented database GemStone. 3. A simulation language with provision for stochastic variables. An extension of Autostat. 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 style. 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". 1
- variable noun opal An opal is a precious stone. Opals are colourless or white, but other colours are reflected in them. 0
- noun opal an amorphous, usually iridescent, mineral that can be of almost any colour, found in igneous rocks and around hot springs. It is used as a gemstone. Composition: hydrated silica. Formula: SiO2.nH2O 0
Information block about the term
Origin of opal
First appearance:
before 1350 One of the 20% oldest English words
1350-1400; Middle English < Latin opalus < Greek opállios opal, gem; probably from a source akin to Sanskrit upala precious stone
Historical Comparancy
Parts of speech for Opal
noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
opal popularity
A common word. It’s meaning is known to most children of preschool age. About 86% of English native speakers know the meaning and use the word.
Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".
opal usage trend in Literature
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