(botany) main root of a plant growing straight downward from the stem
something that provides an important central source for growth or development;
"the taproot of his resentment"
"genius and insanity spring from the same taproot"
- Taproot yellowish-brown, elongate-terete, unbranched.
- Taproot long-cylindric, deep-rooted with a slender and elongated stem to soil surface.
- The root system of the soybean consists of a taproot formed by the radicle.