"pertaining to dinner" or other meal, 1820, from Latin prandium "late breakfast, luncheon," from *pram "early" (from PIE *pre-, variant of root *per- (1) "forward," hence "in front of, before, first") + edere "to eat" (from PIE root *ed- "to eat") + -al (1). OED reports it as "affected or jocose." Compare postprandial.
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