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actinoid a. 放射线状的 放射线状的 actinoid adj 1: having a radial form; "starfish are actinoid--that is, they are radially symmetrical" n 1: any of a series of radioactive elements with atomic numbers 89 through 103 [synonym: {actinoid}, {actinide}, {actinon}] Actinoid \Ac"tin*oid\, a. [Gr. ?, ?, ray -oid.]
Having the form of rays; radiated, as an actinia. [1913 Webster]
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