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An outgrowth of the funiculus in certain seeds that either remains as an appendage or envelops the seed.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(also caruncle), an appendage of a seed. Arils, which are usually succulent and fleshy, attract birds and ants that distribute the seeds. Some types of arils are called arillodes and arilli.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Fruit with fleshy pericarp, either an indehiscent berry with the seeds usually embedded in pulp or a pair of dehiscent follicles with arillate seeds; seeds often with deep hilar groove on one side and longitudinal grooves on the other or testa wrinkled or pitted; endocarp not forming a stone; endosperm ruminate.
Fruit mostly indehiscent, with fleshy pen carp and endocarp usually forming a stone (pericarp dry in Condylocarpon and Chilocarpus dehiscent; fruit capsular, dry, and dehiscent in Plectaneja); seeds normally not compressed, usually elongate, globular, or ovoid, longitudinally rolled with deep hilar furrow and ruminate endosperm (compressed and with wing in Plectaneja, arillate in Chilocarpus).