Definition of vernalize in US English:

vernalize

(British vernalise)

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.

Pronunciation

vernalize

/ˈvərnəˌlīz//ˈvərnəˌlaɪz/