Wiktionary
coterminal
a. 1 (context geometry of two angles English) Differing only by a whole number of complete circles. 2 (context category theory English) Describing an object in a category, such that there is precisely one morphism that maps that object to every object in the category. 3 (context university education of a student English) Simultaneously studying towards two or more separate degrees. n. (context aviation English) One of a number of terminals or airports which are interchangeable for the purposes of ticketing.