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Definition of: radicle
(rad′i·kəl) noun
1. Bot. a The embryonic root below the cotyledon of a plant. b A diminutive root or rootlet.
2. Anat. A rootlike part, as the stem of an embryo, the initial fiber of a nerve, the beginning of a vein, etc.
3. Chem. A radical. ♦ Homophone: radical. [<L radicula, dim. of radix, radicis root]
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