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1. An official who evaluates property for taxation.
2. An assistant to a judge or magistrate, usually selected for special knowledge in a particular area.
as′ses·so′ri·al (ăs′ə-sôr′ē-əl) adj.
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.