Concordant sounds, the highest and the lowest, agree in such way that if one of them happens to dissonate it offends the ear.    From Wordnik.com.  [A Popular History of the Art of Music From the Earliest Times Until the Present] Reference

Here already we have a progress in perception of tones, in the ability to discriminate between those which harmonize and those which dissonate.    From Wordnik.com.  [A Popular History of the Art of Music From the Earliest Times Until the Present] Reference

Starting around the late '90s in Poland, a small community of musicians and labels came into existence, creating dissonate sonic sculptures in the tradition of bands/musicians like.    From Wordnik.com.  ["xchannel" via Mindfield in Google Reader] Reference