Aster(n.) A genus of herbs with compound white or bluish flowers; starwort; Michaelmas daisy.
Aster(n.) A plant of the genus Callistephus. Many varieties (called China asters, German asters, etc.) are cultivated for their handsome compound flowers.
Asterism(n.) A constellation.
Asterism(n.) A small cluster of stars.
Asterism(n.) An asterisk, or mark of reference.
Asterism(n.) Three asterisks placed in this manner, /, to direct attention to a particular passage.
Asterism(n.) An optical property of some crystals which exhibit a star-shaped by reflected light, as star sapphire, or by transmitted light, as some mica.
Words within asterisms