The ability of local political jurisdictions, typically counties or municipalities, to allow decisions on certain controversial issues, especially the sale of alcohol, based on popular vote within their borders.

(idiomatic) In resolving a problem, the possible course of action that is considered the most extreme because of its collateral consequences.

plural of optical drive

An electromechanical device that selectively raises small rods over the darker parts of a document, and thus enables blind people to read printed material that has not been transcribed into Braille.

The white, cup-like area in the center of the optic disc

Synonym of light microscope

plural of optical telescope

An instrument, used both for recreational and scientific purposes, which provides a magnified view of distant objects by collecting and focusing light by means of mirrors and/or optical lenses.

Alternative form of clothing optional

(American football) A formation that allows the quarterback to pass the ball or to give the ball to the fullback or to one of two running backs.