Capable of being composed (as from multiple constituent or component elements).

A device used in printing with movable type to hold the type as it is being selected.

(printing, dated) A stand for holding cases of type when in use.

(printing, historical) A thin slip of brass or steel, against which the type is arranged in a composing stick, or by the aid of which stickfuls or handfuls or type are lifted.

plural of composing rule

plural of composing frame

plural of composing stick

(music) Of a song, composed so that each stanza may have different music, rather than the same being repeated for all of them.