What is "sectant"

Sectant \Sec"tant\, n. [L. secare, sectum, to cut.] One of the portions of space bounded by the three coordinate planes. Specif. (Crystallog.), one of the parts of a crystal into which it is divided by the axial planes.

n. 1 One of the portions of space bounded by the three coordinate planes. 2 (context crystallography English) One of the parts of a crystal into which it is divided by the axial planes.