Brachii is a Latin term that refers to the biceps muscle. The word is commonly used in medical and anatomical language. There are several synonyms that can be used instead of Brachii. One of the most commonly used terms is biceps, which is derived from the Latin term bis (meaning "two") and caput (meaning "head"). Another synonym for Brachii is bicep brachii, which is a combination of the Latin term for biceps and the adjective form of brachii. Other synonyms that can be used for Brachii include the upper arm muscles, elbow flexors, and the arm bender muscles. These terms can be used interchangeably with Brachii in medical and anatomical discussions.