Definition of vernation in English:

vernation

noun

Botany
  • [mass noun] The arrangement of bud scales or young leaves in a leaf bud before it opens.

    Compare with aestivation
    • ‘Circinate vernation is the unfurling of the leaves over time.’
    • ‘This plant also has a folded vernation and a very smooth leaf blade.’
    • ‘Even in face view the involute vernation is easily observed for the brief time that a leaf is emerging.’
    • ‘Leaf vernation was observed in at least ten buds per entity, manually dissected under a stereomicroscope.’
    • ‘Recently, a third type of leaf vernation has been shown to occur in Primula.’

Origin

Late 18th century: from modern Latin vernatio(n-), from Latin vernare to grow (as in the spring), from vernus (see vernal).

Pronunciation:

vernation

/vəːˈneɪʃ(ə)n/