synodic period
(astronomy) The apparent orbital period of a planet as seen from Earth.
(now rare) Contradictory.
(slang, derogatory, offensive in Britain) A person with cerebral palsy. / (slang, derogatory, offensive in Britain) A stupid person.
(slang, broadcasting) To fade volume in or out by means of a potentiometer.
火星の会合周期は、地球から見たときにどのくらいの間隔で姿を見せるかを決める。
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