or Bulbous Root, in the anatomy of plants, expresses a root of a round or roundish figure, and usually furnished with fibres at its base.

Bulbous roots are said to be solid, when composed of one uniform lump of matter; tunicated, when formed of multitudes of coats, surrounding one another; squamoso, when composed of, or covered with lesser flakes; duplicate, when there are only two to each plant; and aggregate, when there is a congeries of such roots to each plant.