Как по Английски будет корнеплод

noun

The part of a plant which attaches it to the ground or to a support, typically underground, conveying water and nourishment to the rest of the plant via numerous branches and fibres.

Примеры использования:

Cacti have deep and spreading roots

verb

Cause (a plant or cutting) to grow roots.

Примеры использования:

Root your own cuttings from stock plants

noun

Any plant of the (former) class rhizocarpeae (now the family marsileaceae) of aquatic and semiaquatic ferns; a marsileaceous plant.