radicle /ˈradək(ə)l, ˈrædək(ə)l 
/ ▸ noun Botany the part of a plant embryo that develops into the primary root. ▪ Anatomy a rootlike subdivision of a nerve or vein.
– ORIGIN late 17th century : from Latin radicula, diminutive of radix, radic- ‘root’.
EnglishOxford New American Dictionary
