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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.
Definition of lip - either of the two fleshy parts which form the upper and lower edges of the opening of the mouth, the edge of a hollow container or Definition of lip - either of the two fleshy parts which form the upper and lower edges of the opening of the mouth, the edge of a hollow container or dictionary thesaurus