ἐμ-βᾰδόν · em-badon — LSJ
a surface, area (opp. περίμετρος, Herm. in Phdr. p.108A.), Plb. 6.27.2, Phld. Sign. 15, al., Hero *Deff. 117, POxy. 505.6 (ii A.D.), Theo Sm. p.126 H., etc.: hence, in Arith., product of integers (opp. περίμετρος ‘sumʼ), Theol.Ar. 10.
as Adj., δάκτυλος ἐμβαδός square inch, Hero *Mens. 23.