In female anatomy, the labia minora is a very important part.

In Sanskrit phonology, the sounds within the lips are very important.

In female anatomy, the labia majora is a part of the external genitalia.

In Sanskrit phonology, bilabial sounds play an important role.

She used her depressor labii inferioris to lower the corners of her mouth.

She started a special exercise to strengthen the incisivus labii inferioris muscle.