A depression or a groove found on the surface of an organ or tissue, as on the surface of the brain separating adjacent convolutions. Large sulci that divide the brain into lobes as well as the two hemispheres are more often called fissures. Plural: sulci. See fissure. calcarine sulcus See calcarine fissure.
Definition of SYNERGIST. : something (as a chemical or a muscle) that enhances the effectiveness of an active agent; broadly: either member of a synergistic pair.ADVERTISEMENT.noun synÂ·erÂ·gist \-jÉst\. something (as a chemical or a muscle) that enhances the effectiveness of an active agent; broadly: either member of a synergistic pair. ADVERTISEMENT.
Copyright Â© 2006 Pearson Education, Inc., publishing as Benjamin Cummings Figure 10.9c Trunk Movements: Short Muscles Four short muscles extend from one vertebra to another These muscles are synergists in extension and rotation of the spine.opyright Â© 2006 Pearson Education, Inc., publishing as Benjamin Cummings Figure 10.9c Trunk Movements: Short Muscles Four short muscles extend from one vertebra to another These muscles are synergists in extension and rotation of the spine.