Pronunciation: (as'tu-riz"um),[key] —n. 1. Astron. a. a group of stars.
b. a constellation.
2. Mineral.a property of some crystallized minerals of showing a starlike luminous figure in transmitted light or, in a cabochon-cut stone, by reflected light.
3. three asterisks (a or ) printed to draw attention to a passage it precedes.