| 释义 |
long-day long-day (lông′dā′)adj. Of, relating to, or being a plant that flowers only when the duration of daylight is more than a certain amount, as in late spring or early summer.long-day adj (Botany) (of certain plants) able to mature and flower only if exposed to long periods of daylight (more than 12 hours), each followed by a shorter period of darkness. Compare short-day |