Antemeridian
Pronunciation : An`te*me*rid"i*an
Part of Speech : a.
Etymology : [L. antemeridianus; ante + meridianus belonging to midday or noon. See Meridian.]
Definition : Defn: Being before noon; in or pertaining to the forenoon. (Abbrev. a. m.)
Source : Webster's Unabridged Dictionary, 1913