Binotonous

• (a.) Consisting of two notes; as, a binotonous cry.
Found on http://thinkexist.com/dictionary/meaning/binotonous/

Binotonous

Bi·not'o·nous adjective [ Latin bini two at a time + tonus , from Greek ... , tone.] Consisting of two notes; as, a binotonous cry.
Found on http://www.encyclo.co.uk/webster/B/53

binotonous

consisting or comprised of two musical tones
Found on http://phrontistery.info/b.html
No exact match found