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A corrosive, highly poisonous yellow crystalline compound, C12H9AsClN, used as a poison gas and sometimes with tear gas. Also called diphenylaminechloroarsine.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.