اسْمٌ مُعَرَّبٌ

[An arabicized noun;] a noun received by the Arabs from foreigners, indeterminate, [i. e. significant of a meaning, (as is said in the Mz, 19th نوع,)], such as إِبْرِيسَم [meaning “ silk ”], and, if possible, accorded to some one of the forms of Arabic words; otherwise, spoken by them as they received it; and sometimes they derived from it: but if they received it as a proper name, it is not termed مُعَرَّبٌ, but أَعْجَمِىٌّ, like إِبْرَاهِيمُ and إِسْحَاقُ. (Msb.) [مُعَرَّبٌ alone is also used in this sense, as a subst: and as such its plural is مُعَرَّبَاتٌ: thus in the Mz, ubi suprà; and often in lexicons &c.]