ter·mi·nol·o·gy (tûr?m?-n?l??-j?)n. pl. ter·mi·nol·o·gies 1. The vocabulary of technical terms used in a particular field, subject, science, or art; nomenclature.2. The study of nomenclature.[German Terminologie, from Medieval Latin terminus, expression; see term.]ter?mi·no·log?i·cal (-n?-l?j??-k?l) adj.ter?mi·no·log?i·cal·ly adv.ter?mi·nol?o·gist n.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.terminology (?t??m??n?l?d??) n, pl -gies1. the body of specialized words relating to a particular subject2. the study of terms[C19: from Medieval Latin terminus term, from Latin: end] terminological adj ?termino?logically adv ?termi?nologist nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014ter?mi?nol?o?gy (?t?r m??n?l ? d?i) n., pl. -gies. 1. the system of terms belonging or peculiar to a specialized subject; nomenclature. 2. the science of terms. [1795?1805;