a person who organizes, esp. one who forms and organizes a group.

a person whse job is to enlist employees into membership in a union.

a person who organizes or schedules work

You would get this job done sooner if you were a better organizer.

a multiple folder or, sometimes, a notebook in which correspondence, papers, etc., are sorted by subject, date, or otherwise, for systematic handling.

Embryology . any part of an embryo that stimulates the development and differentiation of another part.

noun

arranger , coordinator , designer , developer , facilitator , promoter