taproot

Definitions of taproot
1

n (botany) main root of a plant growing straight downward from the stem

Type of:
root
(botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground

n something that provides an important central source for growth or development

“the taproot of his resentment”
“genius and insanity spring from the same taproot
Type of:
germ, seed, source
anything that provides inspiration for later work

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