[1] : The Collaborative International Dictionary of English v.0.48

twain \twain\ tw=an, a.  n. oe. twein, tweien, tweyne, as.
   tw=egen, masc. see two.
   two; -- nearly obsolete in common discourse, but used in
   poetry and burlesque. "children twain." --chaucer.
   1913 webster

         and whosoever shall compel thee to go a mile, go with
         him twain.                               --matt. v. 41.
   1913 webster

   in twain, in halves; into two parts; asunder.
      1913 webster

            when old winter split the rocks in twain. --dryden.
      1913 webster

   twain cloud. meteor. same as cumulo-stratus.
      1913 webster
see also:
two in twain twain cloud cumulo-stratus 

[2] : WordNet (r) 2.0

twain
     n : two items of the same kind syn: couple, pair, twosome,
          brace, span, yoke, couplet, distich, duo, duet,
          dyad, duad
see also:
couple pair twosome brace span yoke 
couplet distich duo duet dyad 
duad 

[3] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

twain
     technology without an important name
     
     

[4] : The Free On-line Dictionary of Computing (27 SEP 03)

twain
     
         an image capture api for microsoft
        windows and apple macintosh operating systems.  the
        standard was first released in 1992, and is currently ratified
        at version 1.9 as of january 2000.  twain is typically used as
        an interface between image processing software and a
        scanner or digital camera.
     
        the word twain is from kipling's "the ballad of east and west"
        - "...and never the twain shall meet...", reflecting the
        difficulty, at the time, of connecting scanners and personal
        computers.  it was up-cased to twain to make it more
        distinctive.  this led people to believe it was an acronym,
        and then to a contest to come up with an expansion.  none were
        selected, but the entry "technology without an interesting
        name" continues to haunt the standard.
     
        home http://www.twain.org/.
     
        2000-02-25
     
     
see also:
image capture api microsoft windows apple macintosh operating systems image processing 
scanner digital camera lt;homegt; 

[5] : U.S. Gazetteer (1990)

twain, ca
  zip codes: 95984

[6] : U.S. Gazetteer Places (2000)

twain, ca -- u.s. census designated place in california
   population 2000:    87
   housing units 2000: 57
   land area 2000:     7.419895 sq. miles 19.217440 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    7.419895 sq. miles 19.217440 sq. km
   fips code:            80952
   located within:       california ca, fips 06
   location:             40.018101 n, 121.048898 w
   zip codes 1990:     95984
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    twain, ca
    twain

Twain >> T Words
Twain, definition of term: Twain
twain_pag1.html