primary root

noun Botany.

the first root produced by a germinating seed, developing from the radicle of the embryo.

Origin of primary root

First recorded in 1885–90

Words nearby primary root

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Scientific definitions for primary root

primary root

The first root of a plant, originating in the embryo. In gymnosperms, eudicotyledons, and magnoliids, the primary root develops into the taproot. In monocotyledons, the primary root disintegrates as the lateral roots develop into a system of fibrous roots.