| CATAPHONICS | • cataphonics n. Synonym of catacoustics. • CATAPHONICS n. the area of the science of acoustics that deals with echoes or reflected sounds. |
| ELECTRONICS | • electronics n. (Physics) The study and use of electrical devices that operate by controlling the flow of electrons… • electronics n. (In the plural) A device or devices which require the flow of electrons through conductors and semiconductors… • electronics n. Electronic circuitry. |
| EUDAEMONICS | • eudaemonics n. That part of ethics that deals with happiness; the science of happiness, contrasted with aretaics. • EUDAEMONICS n. the art or theory of happiness, also EUDEMONICS. |
| HISTRIONICS | • histrionics n. Exaggerated, overemotional behaviour, especially when calculated to elicit a response; melodramatics. • HISTRIONICS n. playacting; stagy action or speech. |
| HYDROPONICS | • hydroponics n. The cultivation of plants in a nutrient solution rather than in the soil. • HYDROPONICS n. the practice of growing plants in a chemical solution without soil. |
| HYPERSONICS | • hypersonics n. The study and development of hypersonic propulsion, and hypersonic aerodynamics. • HYPERSONICS n. the study of aircraft behaviour at speeds above Mach 5. |
| SUPERSONICS | • supersonics n. The study of supersonic motion. • supersonics n. Ultrasonics. • supersonics n. Plural of supersonic. |
| SUPERTONICS | • supertonics n. Plural of supertonic. • SUPERTONIC n. the note next above the keynote; the second of the scale. |
| THERMIONICS | • thermionics n. The science dealing with thermionic emission. • THERMIONICS n. physics dealing with thermionic phenomena. |
| ULTRASONICS | • ultrasonics n. The science and technology of ultrasound. • ULTRASONICS n. the study and use of ultrasonic waves. |