kaleidophone (plural kaleidophones)
(obsolete, physics) A device, consisting of a reflective ball attached to a vibrating rod or plate, that produces optical figures that correspond to the mode of vibration of the rod or plate
Source: Wiktionary
Ka*lei"do*phon, Ka*lei"do*phone, Etym: [Gr. (Physics.)
Definition: An instrument invented by Professor Wheatstone, consisting of a reflecting knob at the end of a vibrating rod or thin plate, for making visible, in the motion of a point of light reflected from the knob, the paths or curves corresponding with the musical notes produced by the vibrations.
Source: Webster’s Unabridged Dictionary 1913 Edition
12 March 2025
(noun) small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors
Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.
