Asterism

[Sarah]

An optical property of some crystals which exhibit a star-shaped by reflected light, as star sapphire, or by transmitted light,as some mica.

[Sarah]

Any one of a number of heinously outdated colloquialisms; their rhetorical power lies in their deplorable ability to frustrate or incite hilarity. Upon utterance, a speaker will likely generate the following behavioral, cerebral, or emotional responses:

Externalized disgust (behavioral)
Debilitating brain aneurisms (cerebral)
Crushing submission (emotional)
They should be avoided in day-to-day vernacular, and hopefully eventually removed from English nomenclature.

[Lanell]

A prominent pattern or group of stars that is smaller than a constellation.