obliquation
/ˌɒblɪˈkweɪʃn/Now historical
noun
Bending aside or in an oblique direction; movement away from a straight line, position, or course; an instance of this.
Origin
Late Middle English; earliest use found in Guy de Chauliac's Grande Chirurgie. From post-classical Latin obliquation-, obliquatio action or effect of slanting (late 2nd cent. in Tertullian), strabismus from classical Latin oblīquāt-, past participial stem of oblīquāre + -iō.