1. thermionic vacuum tube electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  2. thermionic tube electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  3. thermionic valve electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  4. thermionic current an electric current produced between two electrodes as a result of electrons emitted by thermionic emission
  5. thermionic emission the emission of electrons from very hot substances
  6. thermonuclear bomb a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium
  7. thermonuclear warhead the warhead of a missile designed to deliver an atom bomb
  8. terminal velocity the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity
  9. thermogravimetry the measurement of changes in weight as a function of changes in temperature used as a technique of chemically analyzing substances
  10. thermogravimeter a hydrometer that includes a thermometer
  11. terminal figure (architecture) a statue or a human bust or an animal carved out of the top of a square pillar; originally used as a boundary marker in ancient Rome
  12. determining factor a determining or causal element or factor
  13. terminus ad quem final or latest limiting point
  14. thermonuclear reactor a nuclear reactor that uses controlled nuclear fusion to generate energy
  15. thermocoagulation congealing tissue by heat (as by electric current)
  16. trimming capacitor capacitor having variable capacitance
  17. terminate bring to an end or halt
  18. vacuum tube electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  19. mormon cricket large dark wingless cricket-like katydid of arid parts of western United States
  20. thermocautery cautery (destruction of tissue) by heat