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单词
photoperiod
释义
WordReference Random House Unabridged Dictionary of American English © 2024
pho•to•pe•ri•od
(fō′tə pēr
′
ē əd),
USA pronunciation
n.
[
Biol.
]
Ecology, Biology
the interval in a 24-hour period during which a plant or animal is exposed to light.
1915–20;
photo
- +
period
pho•to•pe•ri•od•ic
(fō′tə pēr′ē od
′
ik),
USA pronunciation
pho′to•pe′ri•od
′
i•cal
,
adj.
pho′to•pe′ri•od
′
i•cal•ly
,
adv.
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更新时间:2025/11/27 10:24:03