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primary root
noun
, Botany.
- the first root produced by a germinating seed, developing from the radicle of the embryo.
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 .
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Word History and Origins
Origin of primary root1
First recorded in 1885–90
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Example Sentences
Forcible conquest and adverse occupation is nearly always the primary root of title.
From Project Gutenberg
These are exactly like the primary root from which they spring; there is no difference in structure or in machinery of growth.
From Project Gutenberg
The single root of the commoner biennials is the primary root, or tap-root, which begins to thicken in the seedling.
From Project Gutenberg
These are all simple, that is, there is but one primary root.
From Project Gutenberg
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