*irrelative*

a. Not relative; without mutual relations; unconnected. -- Ir*rel"a*tive*ly, adv. [1913 Webster]

Irrelative chords (Mus.), those having no common tone. --
Irrelative repetition (Biol.), the multiplication of parts that serve for a common purpose, but have no mutual dependence or connection. Owen. [1913 Webster]