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(invertebrate zoology)
The bristlelike or hairlike structure in many organisms, especially at or near the tip of the antenna of many Diptera.



in plants, the thin, pointed, sometimes thorny or feathery process on the apex or back of an inferior flowering glume or, less frequently, of the glume of many cereals. An arista may be straight, bent, or spirally twisted (in Stipa and Avena). It plays an important role in the dissemination of cereal grains by the wind or animals.

References in periodicals archive ?
Plantas perennes, de 30-140 cm de altura, aristas de la lema unidas a la base por una columna retorcida, lema de 1214 mm long.
Ad Aristida chiclavensis affinis, sed arista 1820 mm longa, callio elonganto 7,5-8 mm.
Robin's energy, tenacity, and understanding of this marketplace are key to Arista's success in building a world-class e-Learning company," said Jeff Munks, CEO and Founder of Arista Knowledge Systems.
Zhao joins Arista with 17 years in the software industry developing and delivering complex enterprise solutions.
Arista Knowledge Systems' flagship product Accredix(TM) allows organizations to administer, track and measure the learning process regardless of the hardware, software, medium or content used to develop and deliver course material.
Bersin, who joins Arista with 17 years of experience in marketing and sales of enterprise products for large corporations, spent 10 years in key technical, marketing, and management positions at IBM.