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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.
Tingling or Numb Lips. Lip tingling is abnormal feeling, and lip numbness is decreased or absent feeling in the lip. Both sensations, medically called paresthesia, arise from conditions affecting sensory nerves in the lips, but usually not from neurological diseases.