1. relating to or controlled by the length of daylight or the photoperiod, especially in relation to plant growth and animal behavior
Usage: technical/scientific; commonly used in biology and agriculture

Examples

• Photoperiodic responses in plants determine when they flower based on day length.
• Many birds rely on photoperiodic cues to trigger migration patterns.
• The photoperiodic sensitivity of soybeans affects their yield in different regions.
• Photoperiodic changes in autumn signal animals to prepare for winter.
• Scientists study photoperiodic mechanisms to improve crop production.
• The photoperiodic day length varies significantly between tropical and temperate zones.