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long-day

[lawng-dey, long-] /ˈlɔŋˈdeɪ, ˈlɒŋ-/
adjective, Botany
1.
requiring a long photoperiod in order to flower.
Origin
1915-1920
1915-20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for long-day
  • long-day plants are those that require a long period of exposure to light each day in order to produce flowers.
British Dictionary definitions for long-day

long-day

adjective
1.
(of certain plants) able to mature and flower only if exposed to long periods of daylight (more than 12 hours), each followed by a shorter period of darkness Compare short-day
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Value for long

5
8
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