The American Printer: A Manual of Typography / Containing practical directions for managing all departments of a printing office, as well as complete instructions for apprentices; with several useful tables, numerous schemes for imposing forms in every variety, hints to authors, etc.

by Thomas MacKellar

Olla podrida.—An incongruous mixture.

Omne ignotum pro magnifico.—Whatever is unknown is thought to be magnificent.

Omnes.—All.

Omnia bona bonis.—All things are good with the good.

Omnia vincit amor.—Love conquers all things.

On-dit.—A rumour; a flying report.

Onus.—Burden.

Onus probandi.—The responsibility of producing proof.

Ope et consilio.—With assistance and counsel.

Ora et labora.—Pray and work.