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Webster 1913 Edition

Arillus

Ar′il

, ‖

A-ril′lus

,
Noun.
[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 of the white water lily. The mace of the nutmeg is also an aril.
Gray.

Webster 1828 Edition

Arillus

ARIL'LUS

,
Noun.
The exterior coat or covering of a seed, fixed to it at the base only, investing it wholly or partially, and falling off spontaneously; by some writers called, from the Greek, Calyptra. It is either succulent, or cartilaginous; colored, elastic, rough or knotted.

Definition 2024

arillus

arillus

English

Noun

arillus ‎(plural arilli)

  1. (botany) An aril.

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