Stylet

1.

A small poniard; a stiletto.

2.

An instrument for examining wounds and fistulas, and for passing setons, and the like; a probe, -- called also specillum.

3.

A stiff wire, inserted in catheters or other tubular instruments to maintain their shape and prevent clogging.

4.

Any small, more or less rigid, bristlelike organ; as, the caudal stylets of certain insects; the ventral stylets of certain Infusoria.