ἐξάπλωσις
From LSJ
καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)
English (LSJ)
εως, ἡ,
A unfolding, δακτύλων S.E.M.2.7; τῶν ὑμένων εἰς πλάτος Aret.SA1.8; opp. πίλησις, Ph.1.385 (pl.). 2 opening out, of roots, Archig. ap. Orib.8.2.12. II explanation, Erot. Prooem. III expansion or paraphrase of an expression, S.E.M. 7.51. b Math., expansion, εἰς μονάδας Nicom.Ar.2.10.