digastric

 
Pronunciation: /dʌɪˈgastrɪk/
(also digastric muscle)

noun

Anatomy
  • each of a pair of muscles which run under the jaw and act to open it.

Origin:

late 17th century: from modern Latin digastricus, from di- 'twice' + Greek gastēr 'belly' (because the muscle has two fleshy parts or ‘bellies’ at an angle, connected by a tendon)