stylus

Từ điển American Heritage Dictionary 4th

sty·lus (stīʹləs)n. pl. sty·lus·es or sty·li (-lī)
1. A sharp, pointed instrument used for writing, marking, or engraving.
2. Computer Science. A pointed instrument used as an input device on a pressure-sensitive screen.
3. A phonograph needle.
4. A sharp, pointed tool used for cutting record grooves. [Latin, alteration (influenced by Greek stūlos, pillar), of stilus.]