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lip. ( 1 of an embryonic BLASTOPORE) the rim of the blastopore. ( 2 of a flower perianth) a group of perianth segments united to a greater or lesser extent, to form a distinct grouping thus divided from the rest of the perianth. ( 3 of vertebrates) one of two fleshy parts (upper and lower) surrounding the mouth.
A cold sore is a sore that develops on lips. It is caused by infection with one of the herpes viruses. 2 My bottom lip is chapped, the skin that connects to my bottom lip is peeling. The last time this happened, I used Vaseline and got a cold sore.