The question What is the moment when all oscillators aligned to make a jump called? asks for correct term and is closed as off-topic. According to What topics can I ask about here? - Help Center, I think questions asking for terms fall on the categories of:
- Conceptual questions.
Example: Why is the Fourier transform so important?
- Theory questions.
Example: How do the Fourier transforms relate to the Fourier Series?
Knowing the terms is important to study. Yes it can be asked in ELU or ELL, but why should it be off-topic here? We even have a terminology tag.