The term BICEPS is a MUSCLE in the upper ARM that is responsible for flexing the elbow joint. The crossword solutions for this term are MUSCLE (6 letters), FLEX (4 letters), ARM (3 letters), TATTOO (6 letters), ULNAS (5 letters), and ARMLET (6 letters). MUSCLE refers to the biceps as a MUSCLE, FLEX is an action of the biceps, ARM is the body part where the biceps is located, TATTOO is a popular way to decorate the biceps, ULNAS are the two bones in the forearm, and ARMLET is a type of jewelry often worn on the biceps.