Definitions

1. noun

a small, usually one-seeded, pod or capsule, as that of the lily of the valley or the poppy, that splits open to release its seeds.

“The aril of the poppy seed capsule is edible and often used as a garnish.”

2. noun

a small fleshy, often brightly colored, appendage or outgrowth, as that found at the base of the seed of the lily of the valley.

“The aril of the lily of the valley seed is a bright red, fleshy structure.”