[1650–60; miso- + -gamy]This word is first recorded in the period 1650–60. Other words that entered Englishat around the same time include: agency, cardholder, gas, profile, triplet-gamy is a combining form with the meanings “marriage,” “union,” “fertilization, pollination,”of the kind specified by the initial element (exogamy; plastogamy; allogamy). It also forms nouns corresponding to adjectives ending in -gamous (heterogamy)