Meaning

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

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

originFrom Anglo-Norman and Old French pincil (see the variant pincel, which gave rise to Modern French pinceau (“paintbrush”)), from Latin pēnicillum, diminutive of pēniculus (“brush”), itself a diminutive of pēnis (“tail; penis”). Not related to pen.

Etymology from Wiktionary, CC BY-SA 3.0