plural of chalk line

chalk line

A folding chair like a deck chair but sturdier, with wooden support rather than canvas.

A Japanese weapon evolved from the sickle; the kusarigama.

A slaty bluish mineral, a variety of argillaceous slate, used for drawing and for making black paint.

A preparation of chalk, cinnamon, and sugar in gum water, formerly used to treat diarrhea in infants.

A variety of steatite obtained from Aragon in Spain.

An indurated clayey ochre containing iron, used by painters and artificers; reddle.

Lightning in angular, zigzag, or forked flashes.

(calculus) A formula for computing the derivative of the functional composition of two or more functions.