Definition of valvate in English:

valvate

adjective

Botany
  • (of sepals or other parts) having adjacent edges abutting rather than overlapping.

    Compare with imbricate
    • ‘The flowers display valvate, distinct, or connate sepals and petals.’
    • ‘The perianth is commonly uniseriate, consisting of 3-5 valvate, basally connate sepals, but sometimes an equal number of petals are also present.’
    • ‘Terminal buds bear imbricate, scaly buds except in the bitternut hickory which has valvate or foliate buds.’
    • ‘The petals have very brief valvate apices.’
    • ‘If buds are present, it is easy to distinguish the valvate, bright yellow buds of Carya cordiformis from the other Carya species, which have ovate buds with overlapping brown scales.’

Origin

Early 19th century: from Latin valvatus having folding doors, from valva valve.

Pronunciation:

valvate

/ˈvalveɪt/