I believe it is the same as the coronary sulcus, or at least the coronary sulcus is one of the two AV sulci. If i am correct than it is the groove on the outside of heart, in which, the circumflex artery lies.
The atrioventricular sulcus or groove is where the right coronary artery lies. It is between the right atrium and the right ventricle.
the right interventricular sulcus I think it is atrioventricular sulus
Coronary sulcus
The Coronary Sinus
Anterior and posterior interventricular/longitudinal sulci (singular sulcus).
If you're referring to the cortex of bone, that would be trabeculae.
The answer is sulcus.
Promachoteuthis sulcus was created in 2007.
The Sullen Sulcus was created in 2002.
Sulci is the plural of sulcus
Fissure is deeper than a sulcus
Interventricular Sulcus