rhytid, rhytids 1. Wrinkle, wrinkles. 2. A skin wrinkle. From the Greek rhytis, meaning 'wrinkle'. Botox is used in the treatment of some rhytid conditions Botox has been used primarily for treating rhytids of the upper face. Its use in the lower part of the face (chin rytids) has been reported by several people, but there is a relative scarcit...