Dictionary entry

προσκεφάλαιον

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament with Strong's

προσ-κεφάλαιον, -ου, τό,

[in LXX: Ez 13:18, 20 (כֶּסֶת), I Es 3:8*;]

a pillow, cushion: Mk 4:38.†