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florigen

[flawr-i-juh n, flohr-] /ˈflɔr ɪ dʒən, ˈfloʊr-/
noun
1.
a hypothetical plant hormone produced in the leaves and transported to the apex to initiate flowering.
Related forms
florigenic, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for florigen

florigen

/ˈflɒrɪdʒən/
noun
1.
the hypothetical plant hormone that induces flowering, thought to be synthesized in the leaves as a photoperiodic response and transmitted to the flower buds
Word Origin
C20: from Latin flōr-, flōsflower + -gen
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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