zygomaticus major

Etymology
Borrowed from,.

Noun

 * 1)  A slender band of muscle on each side of the face that arises from the zygomatic bone, inserts into the orbicularis oris and skin at the corner of the mouth, and acts to pull the corner of the mouth upward and backward when smiling or laughing.

Translations

 * Chinese:
 * Mandarin: 顴大肌