[per-uh-neyt, puh-ren-eyt]
verb (used without object), perennated, perennating. Botany.
to survive from season to season for an indefinite number of years.

1615–25; < Latin perennātus, past participle of perennāre to continue for a long time, derivative of perennis; see perennial, -ate1

perennation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
perennate (ˈpɛrɪˌneɪt, pəˈrɛneɪt)
(intr) (of plants) to live from one growing season to another, usually with a period of reduced activity between seasons
[C17: from Latin perennātus, from perennāre, from per- (through) + annus year]

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