ir

from WordNet (r) 3.0 (2006)

Ir
    n 1: a heavy brittle metallic element of the platinum group;
         used in alloys; occurs in natural alloys with platinum or
         osmium [syn: {iridium}, {Ir}, {atomic number 77}]
    2: a board of the British government that administers and
       collects major direct taxes [syn: {Inland Revenue}, {IR}]

from The Collaborative International Dictionary of English v.0.48

Ir \Ir\ n. (Chem.)
   The chemical symbol for iridium, a metallic element of the
   platinum group. It has atomic number 77 and an atomic weight
   of 192.22.

   Syn: iridium.
        [WordNet 1.5]

from The Collaborative International Dictionary of English v.0.48

Ir- \Ir-\
   A form of the prefix in-. See {In-}.
   [1913 Webster]

from The Free On-line Dictionary of Computing (8 July 2008)

IR

   1. <networking> {Internet Registry}.

   2. <electronics> {infrared}.

   (1997-01-30)

from The Free On-line Dictionary of Computing (8 July 2008)

ir

   <networking> The {country code} for Iran.

   (1999-01-27)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

IR
       Interface Repository (ORB)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

IR
       Information Retrieval

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

IR
       Internet Registry

from Hitchcock's Bible Names Dictionary (late 1800's)

Ir, watchman; city; vision