pencil

(noun) a thin cylindrical pointed writing implement; a rod of marking substance encased in wood.

(noun) graphite (or a similar substance) used in such a way as to be a medium of communication. Examples: "The words were scribbled in pencil." "This artist's favorite medium is pencil."

(noun) a figure formed by a set of straight lines or light rays meeting at a point.

(noun) a cosmetic in a long thin stick; designed to be applied to a particular part of the face. Example: "An eyebrow pencil."

(verb) write, draw, or trace with a pencil. Example: "He penciled a figure."