Electroacoustic stringed instruments more or less in the form of guitars, occurring in two types. One has a hollow body which functions somewhat like a resonator; the other has a solid body serving solely as a mounting block for the bridge and electronic apparatus, and to bear the strings. In both types the sound is electronically amplified and its tone modified by electronic controls.
Source: Art & Architecture Thesaurus
http://vocab.getty.edu/page/aat/300042031
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