Antonyms for recurves

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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Upon closer inspection, however, it will be noticed that there are no delta formations other than on the recurves.

It is not a double loop because all of the recurves of the loop on the right are spoiled by appendages.

Recurrent vein: in Hemerobiidae, the first branch of the subcosta when it recurves toward the base of the wing.