- (Canada), (UK) IPA: /ˈspektrəm/
- IPA: /ˈspɛktrəm/
- SAMPA: /"spEktr@m/
- A range.
- Specifically, a range of colors representing light of various frequencies.
- (chemistry) The pattern of absorption or emission of radiation that is made by a substance when it is put in contact with an energy such as radiation, heat, electricity, etc.