| oscillate | (verb) move or swing from side to side regularly | Synonyms: vibrate |
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| (verb) be undecided about something; waver between conflicting positions or courses of action | Synonyms: hover, vacillate, vibrate |
| oscillating | (adjective) having periodic vibrations | Synonyms: oscillatory |
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| oscillation | (noun) (physics) a regular periodic variation in value about a mean | Synonyms: vibration |
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| (noun) a single complete execution of a periodically repeated phenomenon | Synonyms: cycle |
| (noun) the process of oscillating between states | - |
| oscillator | (noun) generator that produces sonic oscillations or alternating current | - |
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| oscillatory | (adjective) having periodic vibrations | Synonyms: oscillating |
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| oscillogram | (noun) the recording produced by an oscillograph | - |
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| oscillograph | (noun) a device for making a record of the wave forms of fluctuating voltages or currents | - |
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| oscilloscope | (noun) electronic equipment that provides visual images of varying electrical quantities | Synonyms: cathode-ray oscilloscope, CRO, scope |
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| oscine | (adjective) of or relating to the songbirds | - |
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| (noun) passerine bird having specialized vocal apparatus | Synonyms: oscine bird |
| oscitance | (noun) an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom | Synonyms: oscitancy, yawn, yawning |
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| (noun) drowsiness and dullness manifested by yawning | Synonyms: oscitancy |
| oscitancy | (noun) an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom | Synonyms: oscitance, yawn, yawning |
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| (noun) drowsiness and dullness manifested by yawning | Synonyms: oscitance |
| oscitant | (adjective) showing lack of attention or boredom | Synonyms: drowsy, yawning |
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