| anodyne | (adjective) capable of relieving pain | Synonyms: analgesic, analgetic |
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| (noun) a medicine used to relieve pain | Synonyms: analgesic, pain pill, painkiller |
| dyne | (noun) a unit of force equal to the force that imparts an acceleration of 1 cm/sec/sec to a mass of 1 gram | - |
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| heterodyne | (adjective) of or relating to the beat produced by heterodyning two oscillations | - |
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| (verb) combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two | - |