plural of Orthodox Jew

(mineralogy) An orthorhombic-disphenoidal mineral containing hydrogen, oxygen, titanium, and uranium.

(chemistry) boric (especially when compared with other oxyacid species of boron)

An orthopedist.

Any of the genus Orthobunyavirus of bunyaviruses

plural of orthobunyavirus

(linear algebra, functional analysis) The set of all vectors which are orthogonal to a given set of vectors.

plural of orthobicupola

Relating to orthobothriotaxy.

One of the three major divisions of Eastern Christianity, not to be confused with Eastern Orthodox Church and the Church of the East