Definition: lucid

Source: WordNet (r) 1.7

lucid
     adj 1: (of language) transparently clear; easily understandable;
            "writes in a limpid style"; "lucid directions"; "a
            luculent oration"- Robert Burton; "pellucid prose"; "a
            crystal clear explanation"; "a perspicuous argument"
            [syn: limpid, luculent, pellucid, crystal clear,
             perspicuous]
     2: having a clear mind; "a lucid moment in his madness"
     3: capable of thinking and expressing yourself in a clear and
        consistent manner; "a lucid thinker"; "she was more
        coherent than she had been just after the accident" [syn:
        coherent, logical]
     4: transmitting light; able to be seen through with clarity;
        "the cold crystalline water of melted snow"; "crystal
        clear skies"; "could see the sand on the bottom of the
        limpid pool"; "lucid air"; "a pellucid brook";
        "transparent cristal" [syn: crystalline, crystal clear,
         limpid, pellucid, transparent]

Source: Webster's Revised Unabridged Dictionary (1913)

Lucid \Lu"cid\, a. [L. lucidus, fr. lux, lucis, light. See
   Light, n.]
   1. Shining; bright; resplendent; as, the lucid orbs of
      heaven.

            Lucid, like a glowworm.               --Sir I.
                                                  Newton.

            A court compact of lucid marbles.     --Tennyson.

   2. Clear; transparent. `` Lucid streams.'' --Milton.

   3. Presenting a clear view; easily understood; clear.

            A lucid and interesting abstract of the debate.
                                                  --Macaulay.

   4. Bright with the radiance of intellect; not darkened or
      confused by delirium or madness; marked by the regular
      operations of reason; as, a lucid interval.

   Syn: Luminous; bright; clear; transparent; sane; reasonable.
        See Luminous.

Source: The Free On-line Dictionary of Computing (2003-OCT-10)

LUCID

   1. Early query language, ca. 1965, System Development Corp,
   Santa Monica, CA.  [Sammet 1969, p.701].

   2. A family of dataflow languages descended from ISWIM,
   lazy but first-order.

   Ashcroft & Wadge <<a href="mailto:wwadge@csr.uvic.ca">wwadge@csr.uvic.ca>, 1981.

   They use a dynamic demand driven model.  Statements are
   regarded as equations defining a network of processors and
   communication lines, through which the data flows.  Every data
   object is thought of as an infinite stream of simple values,
   every function as a filter.  Lucid has no data
   constructors such as arrays or records.  Iteration is
   simulated with 'is current' and 'fby' (concatenation of
   sequences).  Higher-order functions are implemented using pure
   dataflow and no closures or heaps.

   ["Lucid: The Dataflow Language" by Bill Wadge
   <wwadge@csr.UVic.CA> and Ed Ashcroft, c. 1985].  ["Lucid, the
   Dataflow Programming Language", W. Wadge, Academic Press
   1985].

   (1995-02-16)