- Acoustics: A defined portion of either the audio or radio frequency spectrums. A specific part of the frequency spectrum such as AM, FM, VHF, UHF, etc. Source: Church Audio & Acoustics Glossary
- Anthropology: When used generally, this term refers to small-scale societies whose economy is based on hunting, gathering, and fishing, and have a relatively un-complex social organization. Source: Anthromorphemics
- Chemistry: A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.
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