What is a small round pill with a minus sign printed on it?

A small round pill with a minus sign printed on it could potentially be a medication, but the exact identification requires more information such as color, size, and any additional markings. Many pills have unique imprints that are used to identify their composition and dosage. To accurately identify the pill, it's best to consult a pharmacist or use a pill identification tool online. Always exercise caution and avoid taking any unidentified medication.