antemeridian

from WordNet (r) 3.0 (2006)
antemeridian
    adj 1: before noon [ant: {postmeridian}]
    
from The Collaborative International Dictionary of English v.0.48
Antemeridian \An`te*me*rid"i*an\, a. [L. antemeridianus; ante +
   meridianus belonging to midday or noon. See {Meridian}.]
   Being before noon; in or pertaining to the forenoon. (Abbrev.
   a. m.)
   [1913 Webster]
    

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