homaloidalyoudaoicibaDictYouDict[homaloidal 词源字典]
"Of or relating to straight lines and planes; satisfying the axioms of Euclidean geometry, flat", Mid 19th cent.; earliest use found in James Joseph Sylvester (1814–1897), mathematician. From ancient Greek ὁμαλός + -oidal.[homaloidal etymology, homaloidal origin, 英语词源]