In the music of the Greek Church, the sign for the key-note.
A suffix, really -son, with an element (-i-) belonging to the stem in some nouns coming from Latin through the Old French. It is equivalent to -ation, -etion, -ition, in nouns originally abstract. Examples are comparison, fermison, garrison, jettison, orison, venison, warnison. In benison and malison doublets of benediction and malediction, the -i- belongs to the reduced radical. In caparison the termination is conformative. See -son, -tion.
The Century Dictionary (Public Domain)