1. In medicine, a skin disease marked by inflammation of pimples and nodules of the hair follicles, especially of the beard: " Sam's doctor told him that he had sycosis in the bearded part of his face that was caused by bacterial infection."
2. A kind of ulcer on an eyelid or eyelids: "The doctor told Hugo that he had a sycosis on his left eyelid that closely resembled a fig."
3. Etymology: from Latin sycosis, "a sore resembling a fig"; from Greek sukosis, from sukon, "fig".