Final answer:
The condition known as cheilosis is characterized by splitting of the lips and corners of the mouth, often related to nutritional deficiencies such as a lack of B vitamins or iron.
Step-by-step explanation:
The condition characterized by splitting of the lips and angles of the mouth is known as cheilosis. This condition is one of the deficiency diseases, which can present with a variety of symptoms, including characteristic lesions of the lips, dermatitis of the face, and a magenta tongue. It may be associated with a deficiency of certain vitamins like B-complex vitamins (particularly riboflavin) and iron.