(Catholicism, historical) One of the orders of the Catholic Church lower than the major orders (diaconate and priesthood); i.e. the order of acolyte, exorcist, lector or porter.

A traditional logging tool consisting of a wooden lever handle with a movable metal hook at one end, used for handling and moving logs.

(rare) A female aristocrat.

(physics) of or relating to a change in refractive index in the presence of light