A condition or phenomenon occurring during nighttime or late evening, particularly in medical or natural history contexts.
From epi- (Greek 'upon') + nyktis (Greek 'night'). This is a specialized medical or scientific term combining Greek roots to describe nocturnal phenomena.
By combining Greek 'epi-' (upon) with 'nyktis' (night), scientists created a word for things that happen 'upon the night'—it's a very precise way to distinguish nighttime events from daytime ones in medical records!
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