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n. The main root of a plant, usually stouter than the lateral roots and growing straight downward from the stem.

n. The root of a plant which penetrates the earth directly downward to a considerable depth without dividing.

n. In botany, the main root of a plant, which grows vigorously downward to a considerable depth, giving off lateral roots in acropetal succession. See cut under root.

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

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

"Tepary beans’ taproot is twice as long as common beans’ (Phaseolus vulgaris), which allows teparies to efficiently take advantage of even small amounts of soil moisture."

source    seed    germ    root   

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