Asterism

As`ter`ism

n.	1.	(Astron.) A constellation.
	2.	(Printing) An asterisk, or mark of reference.
	3.	(Crystallog.) An optical property of some crystals which exhibit a star-shaped by reflected light, as star sapphire, or by transmitted light, as some mica.

Noun	1.	asterism - (mineralogy) a six-rayed star-shaped figure seen in some crystal structures under reflected or transmitted light
	2.	asterism - (astronomy) a cluster of stars (or a small constellation)