What's the adjective for duality? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs dualize and dualise which may be used as adjectives within certain contexts.
dual
Exhibiting duality; characterized by having two (usually equivalent) components.
(grammar) Pertaining to grammaticalnumber (as in singular and plural), referring to two of something, such as a pair of shoes, in the context of the singular, plural and in some languages, trial grammatical number. Modern Arabic displays a dual number, as did Homeric Greek.
(linear algebra) Being the space of all linear functionals of (some other space).
(category theory) Being the dual of (some other category); containing the same objects but with domain and codomain reversed for all functions.