(projective geometry) A line that includes a point at infinity; a line in a projective space; a projective space of dimension 1.

A unit of advertising space that is one column wide and one agate (one fourteenth of an inch) deep.

In rugby, the line at the end of the pitch past, or on, which the ball must be placed to score a try

(nautical) An imaginary line between two objects that can be used to chart a safe course in a difficult situation.

(medicine, colloquial) Arterial line.

plural of short line

plural of line card

(electronics, telecommunications) A modular electronic circuit designed to fit on a separate PCB and interface with a telecommunications access network.

(traffic) a line instructing people to allow people, whose paths cross theirs and who have right of way, to move first

A scan of a single line. / An image built up from such scans. / (photography) A camera that produces such images.