Definition of stylet

• n. - A small poniard; a stiletto.
• n. - An instrument for examining wounds and fistulas, and for passing setons, and the like; a probe, -- called also specillum.
• n. - A stiff wire, inserted in catheters or other tubular instruments to maintain their shape and prevent clogging.
• n. - Any small, more or less rigid, bristlelike organ; as, the caudal stylets of certain insects; the ventral stylets of certain Infusoria.