Birectangular definitions

Birectangular

1) Having two right angles
Found on https://www.crosswordclues.com/clue/birectangular

Birectangular

• (a.) Containing or having two right angles; as, a birectangular spherical triangle.
Found on http://thinkexist.com/dictionary/meaning/birectangular/

Birectangular

Bi`rec·tan'gu·lar adjective [ Prefix bi- + rectangular .] Containing or having two right angles; as, a birectangular spherical triangle.
Found on http://www.encyclo.co.uk/webster/B/56