Radicle
Radicle (rad"i*k'l) , noun
[Latin radicula, dim. of radix, -icis, root: compare French radicule. See Radix.]
(a)
(Botany) The rudimentary stem of a plant which supports the cotyledons in the seed, and from which the root is developed downward; the stem of the embryo; the caulicle.
(b)
(Botany) A rootlet; a radicel.