photoperiodical

 [foh-tuh-peer-ee-uhd]  

pho·to·pe·ri·od

   [foh-tuh-peer-ee-uhd]
noun Biology.
the interval in a 24-hour period during which a plant or animal is exposed to light.
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Origin:
1915–20; photo- + period

Related forms
pho·to·pe·ri·od·ic  [foh-tuh-peer-ee-od-ik] , pho·to·pe·ri·od·i·cal, adjective
pho·to·pe·ri·od·i·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To photoperiodical

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Photoperiodical is always a great word to know.
So is lollapalooza. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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