UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌθɪəˈrɛtɪks/US:USA pronunciation: respellingUSA pronunciation: respelling(thē′ə retiks)

WordReference Random House Unabridged Dictionary of American English © 2020
the•o•ret•ics  (thē′ə retiks),USA pronunciation n. (used with a sing. v.)
  1. the theoretical or speculative part of a science or subject.
  • theoret(ic) (see theoretical) + -ics 1650–60

Collins Concise English Dictionary © HarperCollins Publishers::
theoretics /ˌθɪəˈrɛtɪks/ n
  1. (functioning as singular or plural) the theory of a particular subject

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