anisomorphism

From an- +‎ isomorphism.

anisomorphism (countable and uncountable, plural anisomorphisms)

1. (linguistics, lexicography) The absence of an exact correspondence between words etc. in two different languages; the differences between two given languages that create mismatches in a translation dictionary.[1]
   • 2011, David Bellos, Is That a Fish in Your Ear?, Penguin 2012, p. 82:

     These well-known examples of the ‘imperfect matching’ or anisomorphism of languages do not really support the conclusion that translation is impossible.

   Antonyms: bijection, isomorphism