Definition of vernalize in English:

vernalize

(British vernalise)

Pronunciation /ˈvərnəˌlīz/ /ˈvərnəˌlaɪz/

transitive verb

[with object]
  • Cool (seed) during germination in order to accelerate flowering after planting.

    ‘most plants have been vernalized and will establish easily’
    • ‘seedlings were vernalized at 4°C for 6 weeks’

Origin

1930s back-formation from vernalization.