Artspeak: A Guide to Contemporary Ideas, Movements, and Buzzwords, 1945 to the Present
Reference N6490.A87 1997
Critical Terms for Art History
Reference N34.C75 2003
Reference TR15.M63 1998
Useful for definitions (and key bibliography) of avant-garde movements.
Artists' and Illustrators' Encyclopedia
Reference N33.Q5 1977
A Dictionary of Art Terms and Techniques
These dictionaries focus on the materials and methods of traditional artistic media more than other historically and biographically oriented dictionaries. See also the Getty "Looking at" series, a more basic set of dictionaries by medium.