<p><strong>Noun</strong></p><ul><li>Plural: styli</li><li>Definition: an instrument of metal, bone, or the like, used by the ancients for writing on waxed tablets, having one end pointed for incising the letters and the other end blunt for rubbing out writing and smoothing the tablet.</li><li>Also refers to any of various pointed, pen-shaped instruments used in drawing, artwork, etc.</li><li>In computers, it refers to a pen-shaped device used on a display screen to input commands or handwritten text or drawings.</li><li>In audio, it refers to a needle used for cutting grooves in making a disk recording to be played on a phonograph or a needle for reproducing the sounds of a phonograph record.</li><li>Additionally, it can mean any of various pointed wedges used to punch holes in paper or other material, as in writing Braille, or various kinds of pens for tracing a line automatically, as on a recording seismograph or electrocardiograph.</li></ul>