A connected series of measurements, by means of a level, along a given line, such as that of a railroad, to ascertain the profile of the ground.

(printing, historical) A thin piece of metal used to open the lines of type to a regular distance from each other, and for other purposes; a lead.

The depth to which the water present in the soil is expected to freeze in winter. / The depth to which the water present in the soil is actually frozen in a given place at a given point in time.

A cut through forest cleared to permit seismic survey.

A faunal boundary line that separates the ecozones of Asia and Wallacea, a transitional zone between Asia and Australia.

(anatomy) The line that divides the upper two thirds of the anal canal from the lower third. Developmentally, it represents the hindgut-proctodeum junction.

(meteorology) An imaginary line across a continent that separates moist air from an eastern body of water and dry desert air from the west.

plural of dry line

plural of red line

plural of line number