rootlet

From root +‎ -let.

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rootlet (plural rootlets)

1. One of the smallest roots, hair roots.
   • 2013, Margaret Atwood, MaddAddam, Bloomsbury, page 208:

     She can almost hear them pushing up through the soil, their rootlets sniffing for nutrients and crowding the rootlets of their neighbours, their leaves releasing clouds of airborne chemicals.

• rootling

• tootler