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There are 7 words containing OPERIOD

PHOTOPERIODphotoperiod n. (Biology) The normal duration of natural daylight experienced by an organism; daylength.
PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight.
PHOTOPERIODICphotoperiodic adj. Of, pertaining to, or exhibiting photoperiodism.
PHOTOPERIODIC adj. relating to a photoperiod.
PHOTOPERIODISMphotoperiodism 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.
PHOTOPERIODISMSphotoperiodisms n. Plural of photoperiodism.
PHOTOPERIODISM n. a plant or animal's response or capacity to respond to photoperiod.
PHOTOPERIODSphotoperiods n. Plural of photoperiod.
PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight.
THERMOPERIODICthermoperiodic adj. Relating to a thermoperiod.
THERMOPERIODIC adj. relating to thermoperiodism, the effect on an organism of rhythmic temperature variations.
THERMOPERIODISMthermoperiodism n. The property of being thermoperiodic.
THERMOPERIODISM n. the effect on an organism of rhythmic temperature variations.

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.

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See this list for:

  • English Wiktionary: 37 words
  • Scrabble in French: 6 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: 4 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 2 words


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