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meteoroidn.

英 'miːtɪərɒɪd | 美 'mitɪər,ɔɪd
中文n. [天] 流星体
词根词源
meteoroid (n.)"rock floating in space, which becomes a meteor when it enters Earth\\'s atmosphere," formed in English, 1865, from meteor + -oid.
关键词
meteoroid