antideuteron
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an·ti·deu·ter·on
(ăn′tē-do͞o′tə-rŏn′, -dyo͞o′-, ăn′tī-)n.
The antimatter equivalent of deuteron.
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.