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arillus |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Aril \Ar"il\, Arillus \A*ril"lus\, n. [From LL arilli dry grapes, perh. fr L. aridus dry: cf F,. arille.] (Bot.) A exterior covering, forming a false coat or appendage to a seed, as the loose, transparent bag inclosing the seed or the white water lily. The mace of the nutmeg is also an aril. --Gray.