photoperiodical
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photoperiodical — adj. pertaining to the duration of exposure to light over a 24 hour period (Biology) … English contemporary dictionary
photoperiodical — pho·to·periodical … English syllables
photoperiodical — adjective see photoperiod I … Useful english dictionary
photoperiod — photoperiodic /foh teuh pear ee od ik/, photoperiodical, adj. photoperiodically, adv. /foh teuh pear ee euhd/, n. Biol. the interval in a 24 hour period during which a plant or animal is exposed to light. [1915 20; PHOTO + PERIOD] * * * … Universalium
pho|to|pe|ri|od|i|cal — «FOH toh PIHR ee OD uh kuhl», adjective. = photoperiodic: (Cf. ↑photoperiodic) »There is some kind of photoperiodical response in every higher plant (Science News Letter) … Useful english dictionary
