bismuth sub·sa·lic·y·late (s?b-s?-l?s??-l?t?, -l?t, -s?l??-s?l??t)n. A salicylate used to treat nausea, indigestion, and diarrhea.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.