Entry 1 sense Webster, 1913 Therapeutics /thĕrˌ-əp-yo͞ot'-ĭks/ · Ther·a·peu·tics · IPA /θˌɛrəpjˈuːtɪks/ 01 n. That part of medical science which treats of the discovery and application of remedies for diseases. 1. That part of medical science which treats of the discovery and application of remedies for diseases.