The Collaborative International Dictionary of English v.0.48:
archipallium \archipallium\ n. 1. 1 the olfactory cortex of the cerebrum. Syn: paleocortex [WordNet 1.5]WordNet (r) 3.0 (2006):
archipallium n 1: the olfactory cortex of the cerebrum [syn: archipallium, paleocortex]