Webster's Ninth New Collegiate Dictionary, ISBN 0-87779-510-X, p. 682

legalism.  (ca. 1864) 1:  strict, literal, or excessive conformity to the law or to a religious or moral code <a revolt against formalism and ~...inspired by American pragmatic philosophy--T I. Cook> 2: a legal term or rule

[Webster's Ninth New Collegiate Dictionary, ISBN 0-87779-510-X, p. 682]