ἀλλεπάλληλος · allepallēlos — LSJ
one upon another, successive, ῥανίδες EM 702.20; νῆσσαι Sch. Arat. 982; cumulative, σύνθεσις (as in συν-ομ-ήλικες) EM 291.37; τὸ ἀ. accumulation, Paus. 9.39.4; alternating, varying, δρόμοι Vett.Val. 331.22; constantly changing, ἀποτελέσματα 243.29. Adv. -ως in varied style, 272.23:—also, in layers, of stones, Arg. E. Ph.:—perh. to be written divisim ἄλλʼ ἐπ., Alciphr. Fr. 6.11.