catflap.org Online Dictionary Query

  chem
     a.
     (lb en informal) (clipping of en chemical)
     n.
     1 (lb en uncountable college slang often capitalized) (clipping of en
  chemistry dot=; t=branch of natural science) (n-g: usually referring to
  the subject or the department.)
     2 (lb en countable informal often plural) (clipping of en chemical)
     3 # A chemical weapon.
     4 # A recreational drug.

  chem-
     pre.
     (alternative form of en chemo-) (lb en before a vowel)

  chem.
     French n.
     (abbreviation of fr chemin)

  Chem.
     n.
     (lb en legal) (abbreviation of en chemical)