To further complicate card type detection, this mapping changes when card companies allocate new numbers, form partnerships with other card companies, or go out of business. When implemented correctly, automatically detecting card type improves payment form usability.
Masseter muscle. In human anatomy, the masseter is one of the muscles of mastication. In the animal kingdom, it is particularly powerful in herbivores to facilitate chewing of plant matter. The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest. Contents.
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia. Related to masseter muscle: temporalis muscle. The major jaw muscle, which participates in protraction, retraction and side to side movement of the jaw. Action. Closes jaw. Nerve. Mandibular branch of trigeminal. Origin, superficial part. Zygomatic process of maxilla, inferior border of zygomatic arch.