| Answer | Crossword Clue |
|---|---|
| thermionics | The branch of science and technology concerned with thermionic emission |
| metallurgy | The branch of science and technology concerned with the properties of metals and their production and purification |
| engineerings | The branch of science and technology concerned with the design, building, and use of engines, machines, and structures |
| nucleonics | The branch of science and technology concerned with atomic nuclei and nucleons, esp. the exploitation of nuclear power |
| engineering | The branch of science and technology concerned with the design, building, and use of engines, machines, and structures |
| pyrometallurgy | The branch of science and technology concerned with the use of high temperatures to extract and purify metals |
