- postmeridiem
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post me·rid·i·em (mə-rĭdʹē-əm)
adv. & adj. Abbr. P.M. or p.m. or P.M.
After noon. Used chiefly in the abbreviated form to specify the hour:
10:30 P.M.; a P.M. appointment.
See Usage Note at P.M.[Latin post merīdiem: post, after + merīdiem, accusative of merīdiēs, midday.]* * *
Universalium. 2010.