RHIZOME

rhizome, rootstock, rootstalk

(noun) a horizontal plant stem with shoots above and roots below serving as a reproductive structure

Source: WordNet® 3.1

Etymology

Noun

rhizome (plural rhizomes)

(botany) A horizontal, underground stem of some plants that sends out roots and shoots from its nodes.

(philosophy) A so-called "image of thought" that apprehends multiplicities. See Rhizome (philosophy).

Source: Wiktionary

Rhi*zome", n. Etym: [Gr. rhizome.] (Bot.)

Definition: A rootstock. See Rootstock.

Source: Webster’s Unabridged Dictionary 1913 Edition