D defs.my
Entry 1 sense Webster, 1913

Sectant

· Sec·tant · IPA
01 n. 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 …
  1. 1.
    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.(Crystallog.)