Liddell-Scott-Jones

πτυχή (ptuchē) fold ^G:N-F

Included with: πτυχή, ἡ

(nominative only Grammars ,[Refs 5th c.AD+], dative πτῠχί [Refs 8th c.BC+] πτῠχή, ῆς, which prevails in [Refs 5th c.BC+] and Trag.; the metre requires accusative singular πτύχα in [Refs 5th c.BC+]; in other places either πτύχας or πτυχάς will suit the metre:—poetry word, layer, plate, mostly in plural, σάκεος πτύχες plates of metal or leather, in strong shields, [Refs 8th c.BC+]

__2 fold (i.e.folded piece) of a garment, in plural, first in [Refs 5th c.BC+]; of the entrails, κατὰ σπλάγχνων πτυχάς[Refs 4th c.BC+]; coats of the stomach, [Refs 2nd c.AD+]; layers of muscles, [Refs]
__3 writing tablets, ἐν πτυχαῖς βίβλων κατεσφραγισμένα [Refs 5th c.BC+]
__II in hilly country, folds, glens, κατὰ πτύχας Οὐλύμποιο [Refs 8th c.BC+]; πτύχες ἠνεμόεσσαι (from the wind that rushes down narrow mountain-clefts), [Refs 8th c.BC+]; also in singular, πτυχὶ Οὐλύμποιο, Παρνησοῖο, [Refs 8th c.BC+]; πτυχαὶ Κρισαῖαι, Πίνδου, Πέλοπος, [Refs 5th c.BC+]
__III metaphorically, ὕμνων πτυχαί folds of song, i.e. sinuous songs, [Refs 5th c.BC+]
__IV accusative plural πτυχάς or πτύχας leaves of a folding door, metaphorically, ὁ κλείσας οὐρανοῦ δισσὰς π. [Refs]; nominative πτύχες, ={θύραι},{σανίδες}, [Refs 2nd c.AD+]
__V πτυχή, ἡ, the part of a ship on which her name was inscribed, [Refs 3rd c.BC+]; compare πτυχίς.