Liddell–Scott–Jones: κατῆλιψ

κατῆλιψ,ῐφος,ἡ, variously expld. as

A. ladder, roof-beam, upper story, etc. in Ar. Ra. 566 , cf. Sch.ad loc., Poll. 7.123 , Hsch. ; also used by Luc. Lex. 8 .