Title: The Diskionary: A Glossary of Terms Commonly Used for Disks and Related Objects, First Edition Authors: Neal Evans, Nuria Calvet, Lucas Cieza, Jan Forbrich, Lynne Hillenbrand, Charlie Lada, Bruno Merín, Steve Strom, Dan Watson
Based on a panel discussion at the meeting "New Light on Young Stars: Spitzer's View of Circumstellar Disks", we provide some definitions of common usage of terms describing disks and related objects.