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An organ or part, especially a tooth, having three cusps.
adj. also tri·cus·pi·dal (-pĭ-dəl) or tri·cus·pi·date (-pĭ-dāt′)
1. Having three cusps, especially a molar tooth.
2. Of or relating to the tricuspid valve.
[From Latin tricuspis, tricuspid-, having three points : tri-, tri- + cuspis, point.]
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.