/ˌbaɪɑːrtɪkjʊˈlɑːr/ BAY-uh-TRIK-yoo-LAR

Definitions

1. adjective

Having two joints or points of articulation.

“This exercise targets the biarticular muscles in the knee and hip.”

2. noun

A muscle or muscle group that acts on two joints or has two points of articulation.

“The biarticular muscles in the quadriceps and hamstrings help in stabilizing the knee.”