Definition of unstable oscillation
: an oscillation (as of an airplane) whose amplitude increases continuously until an altitude is reached from which there is no tendency to return toward the original altitude, the motion becoming a steady divergence — compare stable oscillation
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“Unstable oscillation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unstable%20oscillation. Accessed 12 Aug. 2022.
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