Liddell–Scott–Jones: πτῠχ-ίς

πτῠχ-ίς,ίδος,ἡ,

A. slab, in sg. as collective, μαρμάρων πτυχίς

Procop.Gaz. Ecphr. p.151B.

; = ἀκροστόλιον , the part of a ship on which the name was inscribed, Poll. 1.86 ; cf.πτύξ v.