Lexical Definition

‎κέραμος‎ kéramos (ker'-am-os) clay roof tile ^G:N-M
probably from the base of ‎κεράννυμι‎ (through the idea of mixing clay and water)

tiling.

• earthenware, i.e. a tile (by analogy, a thin roof or awning)

Abbott-Smith

κεραμος, -ου, ὁ (< κεράννυμι), [in LXX: II Ki 17:28 (יוֹצֵר כְּלִי)*;]
1. potter's clay.
2. an earthen vessel.
3. a tile: Lk 5:19.†

Abbott-Smith References

Liddell-Scott-Jones

κέραμος, ὁ,

rare plural κέραμα, τά, [Refs 3rd c.BC+]:— potter's earth, potter's clay, [Refs 5th c.BC+]

__II anything made of this earth, as
__II.1 earthen vessel, wine-jar, ἐκ κεράμων μέθυ πίνετο [Refs 8th c.BC+]; in collective sense, pottery, [Refs 5th c.BC+]; κ. ἐσάγεται πλήρης οἴνου jars full of wine, [Refs 5th c.BC+]
__II.1.b jar of other material, κ. ἀργυροῦς [Refs 2nd c.BC+]
__II.2 tile, [Refs 5th c.BC+]; collectively, tiling, τοῦ τέγους τὸν κέραμον αὐτοῦ χαλάζαις.. ξυντρίψομεν [Refs 5th c.BC+] roof, [Refs 5th c.BC+]
__II.3 pottery (i.e.place of manufacture), ὁ κ. ὁ χυτρικός [Refs]
__III dungeon (said by [Refs 8th c.BC+]. (Possibly cognate with Latin cremo.)