Are yams and sweet potatoes the same?
1640s, from French crayon "pencil" (16c.), originally "chalk pencil," from craie "chalk," from Latin creta "chalk, pipe-clay," of unknown origin. Not now considered to mean "Cretan earth," as once was believed.
an implement for drawing made from clay, chalk, plumbago, dry colour, and wax. There are two types of crayons, the colouring crayon and the chalk crayon.