Definition of perennation in US English:

perennation

noun

Botany
  • See perennate

    • ‘It argues that this reflects the greater ability of plants to survive environmental stress via losing leaves or even whole branch systems, or by perennation as underground stems, rhizomes or seeds.’
    • ‘However cutting or incomplete pulling can cause the perennation of the plant such that it branches and becomes enlarged.’

Pronunciation

perennation

/ˌperəˈnāSHən/