Pencil

A small, fine brush of hair or bristles used by painters for laying on colors.

A slender cylinder or strip of black lead, colored chalk, slate etc., or such a cylinder or strip inserted in a small wooden rod intended to be pointed, or in a case, which forms a handle, -- used for drawing or writing. See Graphite.

Hence, figuratively, an artist's ability or peculiar manner; also, in general, the act or occupation of the artist, descriptive writer, etc.

An aggregate or collection of rays of light, especially when diverging from, or converging to, a point.

A number of lines that intersect in one point, the point of intersection being called the pencil point.

A small medicated bougie.

To write or mark with a pencil; to paint or to draw.

graphite (or a similar substance) used in such a way as to be a medium of communication; "the words were scribbled in pencil"; "this artist's favorite medium is pencil"