discordant

Short definition from Wiktionary

Adjective

1. 1
   Not in accord or harmony; conflicting, incompatible.
2. 2
   Not in accord or harmony; conflicting, incompatible: Of people: disagreeing with each other; dissenting, quarrelsome.
3. 3
   Not in accord or harmony; conflicting, incompatible: Of sounds: harsh, jarring; specifically (music), of musical notes or tunes: not in harmony; dissonant, inharmonious.
4. 4
   Of a rock formation or other land feature, or its alignment: cutting across or transverse to neighbouring features.
5. 5
   Of a rock formation or other land feature, or its alignment: cutting across or transverse to neighbouring features: Of a coastline: having bands of different types of rock running transversely to the coast, leading to the formation of alternating bays and headlands.
6. 6
   Of two similar subjects, especially twins: differing in some characteristic.
7. 7
   Ellipsis of serodiscordant (“of a couple: with one partner HIV positive and the other HIV negative”).
8. 8
   Of figures, etc.: having opposite signs (for example, positive and negative).

Noun

1. 1
   A thing which is not in accord or harmony with one or more other things.