from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Botany The part of a plant embryo that develops into a root.
- n. Anatomy A small structure, such as a fibril of a nerve, that resembles a root.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The rudimentary shoot of a plant which supports the cotyledons in the seed, and from which the root is developed downward; the root of the embryo.
- n. A rootlet.
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
- n. A rootlet; a radicel.
from The Century Dictionary and Cyclopedia
- n. In botany:
- n. A rootlet: same as radicel.
- n. Specifically, same as caulicle: by late writers appropriately restricted to the rudimentary root at the lower extremity of the caulicle.
- n. In anatomy and zoology, a little root or root-like part; a radix: as, the radicles of a vein (the minute vessels which unite to form a vein); the radicle of a nerve.
- n. In philology, same as radical, 1.
- n. In chem., same as radical, 2.
- n. In the graptolites, the proximal extension of the virgula.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve)
Latin rādīcula, diminutive of rādīx, rādīc-, root; see wrād- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin radicula. (Wiktionary)