photoperiodicadj.

Brit.

/ˌfəʊtəʊˌpɪərɪˈɒdɪk/, U.S.

/ˈˌfoʊdoʊˌpɪriˈɑdɪk/

Origin: Formed within English, by compounding. Etymons: photo- comb. form, periodic adj.¹

Etymology: < photo- comb. form + periodic adj.¹, after photoperiod n.

Biology.

Of, relating to, or designating the effect of changes in the length of daily illumination on the physiology or behaviour of organisms.

ΘΚΠ

the world > life > biology > biological processes > light-related processes > [adjective] > photoregulation > photoperiod

photoperiodic1922

1922 Science 15 Sept. 314/2 Jointing and heading are possible under more nearly an identical photoperiodic stimulus.

1972 Country Life 16 Mar. 630/4 Wild rock doves are photoperiodic..and cease to breed when day lengths become shortened in winter.

1990 Jrnl. Exper. Bot. 41 1013/2 The difficulty of separating florally significant events from concomitant but unrelated changes. This is particularly true when flowering is under environmental control (e.g. photoperiodic induction).

Derivatives

ˌphotoperiˈodically adv. as regards the photoperiod or an organism's response to it.

ΘΚΠ

the world > life > biology > biological processes > light-related processes > [adverb] > photoperiod

photoperiodically1938

1938 Bot. Gaz. 100 245 The Biloxi soy bean, which is very responsive photoperiodically, was used.

1974 Nature 10 May 183/2 The data showed that different strains produced F1 hybrids photoperiodically intermediate between the parents.

1997 New Scientist 14 June 72/1 (advt.) The Siberian hamster is a photoperiodically sensitive (seasonal) mammal.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	photoperiodic
释义	photoperiodicadj. Brit. /ˌfəʊtəʊˌpɪərɪˈɒdɪk/, U.S. /ˈˌfoʊdoʊˌpɪriˈɑdɪk/ Origin: Formed within English, by compounding. Etymons: photo- comb. form, periodic adj.¹ Etymology: < photo- comb. form + periodic adj.¹, after photoperiod n. Biology. Of, relating to, or designating the effect of changes in the length of daily illumination on the physiology or behaviour of organisms. ΘΚΠ the world > life > biology > biological processes > light-related processes > [adjective] > photoregulation > photoperiod photoperiodic1922 1922 Science 15 Sept. 314/2 Jointing and heading are possible under more nearly an identical photoperiodic stimulus. 1972 Country Life 16 Mar. 630/4 Wild rock doves are photoperiodic..and cease to breed when day lengths become shortened in winter. 1990 Jrnl. Exper. Bot. 41 1013/2 The difficulty of separating florally significant events from concomitant but unrelated changes. This is particularly true when flowering is under environmental control (e.g. photoperiodic induction). Derivatives ˌphotoperiˈodically adv. as regards the photoperiod or an organism's response to it. ΘΚΠ the world > life > biology > biological processes > light-related processes > [adverb] > photoperiod photoperiodically1938 1938 Bot. Gaz. 100 245 The Biloxi soy bean, which is very responsive photoperiodically, was used. 1974 Nature 10 May 183/2 The data showed that different strains produced F1 hybrids photoperiodically intermediate between the parents. 1997 New Scientist 14 June 72/1 (advt.) The Siberian hamster is a photoperiodically sensitive (seasonal) mammal. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < adj.1922
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