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

bedbug \bed"bug`\, n. zool.
   a wingless, bloodsucking, hemipterous insect cimex
   lectularius, sometimes infesting houses and especially
   beds. see illustration in appendix.
   1913 webster
see also:
cimex lectularius 

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

bug \bug\ bu^g, n. oe. bugge, fr. w. bwg, bwgan, hobgoblin,
   scarecrow, bugbear. cf. bogey, boggle.
   1. a bugbear; anything which terrifies. obs.
      1913 webster

            sir, spare your threats:
            the bug which you would fright me with i seek.
                                                  --shak.
      1913 webster

   2. zool. a general name applied to various insects
      belonging to the hemiptera; as, the squash bug; the chinch
      bug, etc.
      1913 webster

   3. zool. an insect of the genus cimex, especially the
      bedbug cimex lectularius. see bedbug.
      1913 webster

   4. zool. one of various species of coleoptera; as, the
      ladybug; potato bug, etc.; loosely, any beetle.
      1913 webster

   5. zool. one of certain kinds of crustacea; as, the sow
      bug; pill bug; bait bug; salve bug, etc.
      1913 webster

   note: according to popular usage in england and among
         housekeepers in america around 1900, bug, when not
         joined with some qualifying word, was used specifically
         for bedbug. as a general term it is now used very
         loosely in america as a colloquial term to mean any
         small crawling thing, such as an insect or arachnid,
         and was formerly used still more loosely in england.
         "god's rare workmanship in the ant, the poorest bug
         that creeps." --rogers --naaman. "this bug with
         gilded wings." --pope.
         1913 webster +pjc

   6. computers an error in the coding of a computer program,
      especially one causing the program to malfunction or fail.
      see, for example, year 2000 bug. "that's not a bug, it's
      a feature"
      pjc

   7. any unexpected defect or flaw, such as in a machine or a
      plan.
      pjc

   8. a hidden electronic listening device, used to hear or
      record conversations surreptitiously.
      pjc

   9. an infectious microorganism; a germ4. colloq.
      pjc

   10. an undiagnosed illness, usually mild, believed to be
       caused by an infectious organism. colloq.

   note: in some communities in the 1990's, the incidence of
         aids is high and aids is referred to colloquially as
         "the bug".
         pjc

   11. an enthusiast; -- used mostly in combination, as a camera
       bug. colloq.
       pjc

   bait bug. see under bait.

   bug word, swaggering or threatening language. obs.
      --beau.  fl.
      1913 webster
see also:
bogey boggle cimex cimex lectularius bedbug bedbug 
year 2000 bug bait bug bait bug word 

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

chinch \chinch\, n. cf. sp. chinche, fr. l. cimex.
   1. zool. the bedbug cimex lectularius.
      1913 webster

   2. zool. a bug blissus leucopterus, which, in the
      united states, is very destructive to grass, wheat, and
      other grains; -- also called chiniz, chinch bug,
      chink bug. it resembles the bedbug in its disgusting
      odor.
      1913 webster
see also:
cimex cimex lectularius blissus leucopterus chiniz chinch bug chink bug 

[4] : WordNet (r) 2.0

cimex lectularius
     n : bug of temperate regions that infests especially beds and
         feeds on human blood syn: bedbug, bed bug, chinch
see also:
bedbug bed bug chinch 

Cimex >> C Words
Cimex, definition of term: Cimex
cimex_pag1.html