[1] : The Collaborative International Dictionary of English v.0.48

taproot \tap"root`\, n. bot.
   the root of a plant which penetrates the earth directly
   downward to a considerable depth without dividing.
   1913 webster

[2] : WordNet (r) 2.0

taproot
     n 1: botany main root of a plant growing straight downward from
          the stem
     2: something that provides an important central source for
        growth or development; "the taproot of his resentment";
        "genius and insanity spring from the same taproot"

[3] : Moby Thesaurus II by Grady Ward, 1.0

28 moby thesaurus words for "taproot":
   beginning, bulb, bulbil, commencement, conception, corm,
   derivation, genesis, grass roots, head, inception, origin,
   original, origination, provenience, radical, radicle, radix,
   rhizome, rise, root, rootstock, source, stem, stock, tap, tuber,
   tubercle

Taproot >> T Words
Taproot, definition of term: Taproot
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