a·mi·no·sal·i·cyl·ic acid (?-m??n?-s?l??-s?l??k, ?m??-n?-)n. See para-aminosalicylic acid.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.