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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 as·ter·ism /ˈæstəˌrɪzəm/

From: Webster's Revised Unabridged Dictionary (1913)

 As·ter·ism n.
 1. Astron. (a) A constellation. [Obs.] (b) A small cluster of stars.
 2. Printing (a) An asterisk, or mark of reference. [R.] (b) Three asterisks placed in this manner, ⁂, to direct attention to a particular passage.
 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.

From: WordNet (r) 2.0

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