One of the mysteries of the English language finally explained.
In full "Nagami kumquat". The oval or oblong fruit of a cultivated type of kumquat of the species Fortunella margarita; the shrub or small tree bearing this fruit.
1930s; earliest use found in American Journal of Botany. From Japanese nagami- (in nagami-kinkan from naga-, combining stem of nagai long + mi fruit + kinkan kumquat (from Middle Chinese)); originally in Nagami kumquat after Japanese nagami-kinkan.
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