1 entry 1 source
Actinophone
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
An apparatus for the production of sound by the action of the actinic, or ultraviolet, rays.
1 entry 1 source
Part of speech: noun (n.)
An apparatus for the production of sound by the action of the actinic, or ultraviolet, rays.