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 There are 2 fourteen-letter words containing OPERIOD| PHOTOPERIODISM | • photoperiodism n. (Biology) The growth, development and other responses of plants and animals according to the length… • PHOTOPERIODISM n. a plant or animal's response or capacity to respond to photoperiod.
 |  | THERMOPERIODIC | • thermoperiodic adj. Relating to a thermoperiod. • THERMOPERIODIC adj. relating to thermoperiodism, the effect on an organism of rhythmic temperature variations.
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 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the WikWik.org and 1Word.ws.
 
 See this list for:English Wiktionary: 6 wordsScrabble in French: no wordScrabble in Spanish: no wordScrabble in Italian: 2 wordsScrabble in German: no wordScrabble in Romanian: no word
 
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