Meridiem

noun

Definitions

Noun
  1. 1
    Midday, noon. rare, uncountable

    "Quantities and frequencies are distributed as follows (neglecting the meridiem hour):[…]"

  2. 2
    The property of a timestamp of being either a.m. or p.m. countable

    "The terminal responds N HH MM CR where N, HH, and MM are the meridiem, hour, and minutes, as above."

Etymology

Back-formation from the phrases ante meridiem and post meridiem (more commonly a.m. and p.m.), from Latin merīdiem, accusative of merīdiēs (“midday, noon”).

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