A surgical instrument for penetrating and exploring bodily passages and cavities.
1) A slender rod of flexible material, with blunt bulbous tip, used for exploring sinuses, fistulas, other cavities, or wounds.
2) A device or agent used to detect or explore a substance; e.g., a molecule used to detect the presence of a specific frag ment of DNA or RNA or of a specific bacterial colony.
3) To enter and explore, as with a probe.