Definition of "trigraph" []

• Three letters spelling one consonant, vowel, or diphthong, such as Sch in Schiller or igh in high or thigh. (noun)
• A group of three letters, especially of frequent occurrence in a given language, as the or ing in English or gli in Italian. (noun)
• Any combination of three letters of an alphabet. Also called trigram. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The difference may be in the language to describe the concepts (rods), or the subjective value of even studying them (trigraph, linguals)."
• "This trigraph is frequently found in medieval and Renaissance art."
• "What are the following, and give examples of each: trigraph, subvocals, diphthong, cognate letters, linguals & nbsp;"