from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fleshy, usually brightly colored cover of a seed, arising from the hilum or funiculus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A tissue surrounding the seed in certain fruits.
from the GNU version of the Collaborative International Dictionary of English
- n. A exterior covering, forming a false coat or appendage to a seed, as the loose, transparent bag inclosing the seed of the white water lily. The mace of the nutmeg is also an aril.
from The Century Dictionary and Cyclopedia
- n. In botany, a term variously applied to the accessory coverings or appendages of seeds.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. fleshy and usually brightly colored cover of some seeds that develops from the ovule stalk and partially or entirely envelopes the seed
Medieval Latin arillus, grape seed.(American Heritage® Dictionary of the English Language, Fourth Edition)