(intransitive, literally) To grow roots into soil. / (intransitive, figuratively) To become established, to take hold.

(mathematics) Of a number or expression, a number or expression the cube of which is equal to the given number or expression.

(mathematics) The number which, when squared, yields another number. / (mathematics) The positive number which, when squared, yields another number; the principal square root.

Ginger, the underground stem, or rhizome, of the plant Zingiber officinale.

A beverage, most often a carbonated soft drink made from a combination of vanilla, cherry tree bark, licorice root, sarsaparilla root, sassafras root bark, nutmeg, anise, and molasses, among other things.

(US) The root of the liquorice plant, Glycyrrhiza glabra, from which a sweet flavoring with an anise scent is extracted. / Glycyrrhiza, especially Glycyrrhiza lepidota (American licorice)

a reflex in infants in which the head is turned towards any stimulus; used to find the nipple

(computing) Alternative spelling of rootkit

(literally, of a plant) Having deep roots; (of a non-living object) deeply and firmly embedded (in the ground, etc.). / (figuratively) Firmly established in thought or behaviour and difficult to change.

The pressure (the result of osmosis) exerted by the roots of vascular plants that moves water into the leaves and causes guttation.