verb (used with object), vernalized, vernalizing.
to shorten the growth period of (a plant) by chilling or other special treatment of it, its seeds, or its bulbs.
Also, especially British, vernalise.

1820–30; vernal + -ize

vernalization, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vernalize or vernalise (ˈvɜːnəˌlaɪz)
to subject ungerminated or germinating seeds to low temperatures, which is essential for many (plants) of temperate environments to ensure germination in some species and flowering in others
vernalise or vernalise
vernali'zation or vernalise
vernali'sation or vernalise

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
At that time they were placed outdoors, where they were left through the winter so the cold would effectively vernalize them.
Clone, vernalize and intercross tall fescue parents that differ in stem rust resistance.
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