Definition of "photoperiodic" []

• Of, pertaining to, or exhibiting photoperiodism (adjective)

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• "Given the marked photoperiodic control of the frost-hardening process in woody species at high latitudes, it is understandable that they harden more extensively compared to populations at lower latitudes under similar temperatures."
• "I can postulate that the extra light the cactus now gets triggered some photoperiodic phenomenom."
• "It's been known for some time that when people are denied photoperiodic cues their rhythms tend to lengthen, usually stabilizing between twenty-seven and thirty-six hours."