<p><strong>Noun:</strong></p><ul><li>Anatomy.</li><li>Plural: bicepses or biceps.</li><li>Either of two flexor muscles:<ul><li>One biceps brachii located in the front of the upper arm and assisting in bending the arm.</li><li>The other biceps femoris located on the back of the thigh and assisting in bending the leg.</li></ul></li></ul>