What is "orangequat"

n. 1 A citrus tree, a cross between an orange and a kumquat 2 The fruit from this tree

The orangequat is a cross between a Satsuma mandarin and a Meiwa kumquat, hybridized Dr. Eugene May of the USDA and introduced in 1932, and is a member of the citrofortunella group. 'Nippon' is the only named cultivar in existence.