Belonging to the stars; starry.Specifically, in theosophy, an epithet descriptive of a supersensible substance supposed to pervade all space and enter into all bodies; odic; biogenic.n. In theosophy, an astral form or body.In cytology, of or pertaining to an aster: as, the astral rays in the karyokinetic or mitotic division-figure of the cell.In some geologic classifications, noting the primitive period or era in the earth's history characterized as “that of the fluid globe, having a heavy vaporous envelop containing the future water of the globe or its dissociated elements and other heavy vapors or gases.”