Definition of pseudosclerosis in US English:

pseudosclerosis

noun

Medicine
rare
  • Any of several neurological disorders thought to resemble multiple sclerosis clinically but not pathologically; specifically. Wilson's disease and (more fully "spastic pseudosclerosis") Creutzfeldt–Jakob disease.

Origin

Late 19th century; earliest use found in John S. Billings (1838–1913). After German Pseudo-Sclerose.