per·en·nate (pěr'ə-nāt', pə-rěn'āt) intr.v.
per·en·nat·ed, per·en·nat·ing, per·en·nates To survive from one growing season to the next, often with a period of reduced or arrested growth between seasons. Used of plants or plant parts.
[Latin perennāre, perennāt-, to last many years, from perennis, lasting for years; see perennial.] per'en·na'tion n.