taproot


tap·root

noun \-ˌrüt, -ˌrt\

: the large main root of a plant from which smaller roots grow

Full Definition of TAPROOT

1
:  a primary root that grows vertically downward and gives off small lateral roots
2
:  the central element or position in a line of growth or development

Origin of TAPROOT

1tap
First Known Use: 1601

taproot

noun    (Concise Encyclopedia)

Main root of a primary-root system. It grows vertically downward. From the taproot arise smaller lateral roots (secondary roots), which in turn produce even smaller lateral roots (tertiary roots). Most dicotyledonous plants (see cotyledon), such as dandelions, produce taproots. The system may be modified into a fibrous, or diffuse, system, in which the initial secondary roots soon equal or exceed the primary root in size and there is no well-defined single taproot. Fibrous root systems are generally shallower than taproot systems. Carrots and beets are tuberous roots modified from taproots.

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