a vertical line usually divides sections of a phrase by parts of a taaLa, by separating the angas or sections. A double vertical line indicates the end of the phrase and of the aavartanam (taaLa cycle)

Any line which is perpendicular to a horizontal plane.

a line that follows the direction of gravity

A line of the form = ; i.e. a line whose slope is undefined.

A straight line perpendicular to the horizon Visible spectrum – the part of the electromagnetic spectrum to which the human eye is sensitive.

A line that has right angles to the horizon. A vertical line is straight up and down.