WordReference Random House Unabridged Dictionary of American English © 2025
root•ball
(ro̅o̅t′bôl′, rŏŏt′-),USA pronunciation n.
- Botanya roughly spherical aggregate of roots and soil that is transplanted with a plant, esp. a tree or shrub.
- Botanythe ball of soil and roots of a plant growing in a pot or other container.
- root1 + ball1 1925–30