(mineralogy) a star-shaped figure with six rays that is seen in some crystal structures under reflected or transmitted light
(astronomy) a cluster of stars (or a small constellation)
造句
用作名詞(n.)
In Greek myth, the Big Dipper asterism represents the hindquarters and tail of the constellation Ursa Major, the Great Bear. 在希臘神話傳說中，北斗七星的三星符號象征著大熊星座的后臀和尾巴。