adjective, Latin limbus = a margin, usually curved.

of or relating to or forming a limbus

System: This network of interconnected structures is located deep within the brain, just above the brain stem. It plays an important role in human emotion, learning and memory.

Usually referring to the Limbic system: Brain structures, including hippocampus, dentate gyrus, and amygdala.

Referring to the limbic system, an evolutionarily older section of the brain that is associated with emotion, learning, and memory

edge-related.

(border or edge).

of or pertaining to the limbic system; as, the limbic system.