rhomboideus

noun, plural rhom·boi·de·i [rom-boi-dee-ahy] /rɒmˈbɔɪ diˌaɪ/. Anatomy.

1. either of two back muscles that function to move the scapula.

noun plural -dei (-dɪˌaɪ)

1. anatomy either of two muscles that connect the spinal vertebrae to the scapulae