noun
stylus
STY-lus/ˈstaɪləs/
A pointed implement that traces a surface.
She uses a stylus to sketch directly on her tablet.

Etymology
Latin stilus meant a stake or pointed writing tool. The modern tool preserves that physical idea: a pointed implement used to write, draw, or interact with a surface.
In context
a system of wedge-shaped symbols pressed into clay tablets using a reed stylus.
More examples
- He presses a pointed stylus into the wax to write his name.
- The record player's stylus follows the grooves as the record spins.
- The machine's stylus traces a line across the moving paper.
Forms
stylus · styluses · styli