Liddell-Scott-Jones

πῆγμα (pēgma) a bank of water ^G:N-N

πῆγμα, ατος, τό,

(πήγνυμι) anything fastened or joined together, framework, of a ship, κέλητος π. [Refs 1st c.BC+]; of a roof, [Refs]; θύρα κέλλας, στοὰ σὺν πήγμασι, [Refs 3rd c.AD+]; τὸ τῶν ὀστέων π. [LXX]; τὸ πιοειδὲς π. [Refs 1st c.AD+]

__2 stage or scaffold used in theatres, [Refs 1st c.BC+]
__3 bookcase, [Refs 1st c.BC+]
__4 metaphorically, π. γενναίως παγέν (Aurat. for πῆμα) bond in honour bound, [Refs 4th c.BC+]; but also τὸ τῆς ὅλης π. σοφίας fabric, [Refs 1st c.AD+]
__II anything congealed, τὸ π. τῆς χιόνος frozen snow, [Refs 2nd c.BC+]; τὸ π. τῆς τροφῆς, i. e. fat, [Refs 2nd c.AD+]; solid mass, ἔστη π., of the waters of Jordan, [LXX]
__III that which makes to curdle, as rennet does milk, [Refs 4th c.BC+]

_{LSJ Scripture Refs: LXX.Josh.3.16}