Bible Dictionary · I
Inkhorn
The Hebrew word so rendered means simply a round vessel or cup for containing ink, which was generally worn by writers in the girdle (Ezek 9:2, Ezek 9:3, Ezek 9:11). The word “inkhorn” was used by the translators, because in former times in this country horns were used for containing ink.
From Easton’s Bible Dictionary (1897), by Matthew George Easton.