ISTabbr. insulin shock therapyAmerican 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.
IST
Is’t
1.A contraction of is it.Webster’s Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
-ist
-istsuff.1. a. One that performs a specified action: lobbyist.b. One that produces, makes, operates, plays, or is connected with a specified thing: novelist.2. A specialist in a specified art, science, or skill: biologist.3. An adherent or advocate of a specified doctrine, theory, or school of thought: anarchist.4. One that is characterized by a specified trait or quality: romanticist.[Middle English -iste, from Old French, from Latin -ist?s, -ista, from Greek -ist?s, agent n. suff.]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.-ist suffix 1. (forming nouns) a person who performs a certain action or is concerned with something specified: motorist; soloist. 2. (forming nouns) a person who practises in a specific field: physicist; typist. 3. (forming nouns and adjectives) a person who advocates a particular doctrine, system, etc, or relating to such a person or the doctrine advocated: socialist. 4. (forming nouns and adjectives) a person characterized by a specified trait, tendency, etc, or relating to such a person or trait: purist. 5. (forming nouns and adjectives) a person who is prejudiced on the basis specified: sexist; ageist. [via Old French from Latin -ista, -ist?s, from Greek -ist?s]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014-ist a suffix of nouns, often corresponding to verbs ending in -ize or nouns ending in -ism, that denote a person who practices, is expert in, or is concerned with something, or holds certain principles, doctrines, etc.: apologist; machinist; novelist; socialist; Thomist. Compare -ism, -istic, -ize. [Middle English -iste