(fencing) An established threat made with the extended arm.

(curling) The line which the stone must completely cross to be considered in play / (curling) The line before which the thrower must let go of the rock during delivery

(physics) a dark or bright line in an otherwise continuous spectrum caused by the absorption or emission of light, at a single wavelength, by the movement of electrons between energy levels of an atom or molecule

(Britain) A rope-like piece of equipment, usually 20 feet or longer in length, attached to the bridle, lungeing cavesson, or halter of a horse to provide control while lungeing.

Alternative form of lashline

(mathematics) The line containing the locus of points from which the segments respectively tangent to two given circles have equal length.

A line of people dancing the conga. / (figuratively) A succession of similar events, especially a quick, unstoppable, and/or comical succession.

(genetics) A biological tissue or group of individual cells that are genetically identical as a result of dividing mitotically from a single progenitor cell.

(physics, astronomy) a spectral line of atomic hydrogen having a wavelength of about 21cm; used extensively in radio astronomy

(curling) The line that goes across the house intersecting with the middle of the button, splitting it into two halves.