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| 单词 | actinoid |
| 释义 | actinoid (once / 11819311 pages) 1n 2adj WORD FAMILY actinoid USAGE EXAMPLESOf the lowest among these orders, the Actinoid Polyps, our Actinia or sea-anemone is a good example. Agassiz, Alexander, Seaside Studies in Natural History...(2011) 1 n any of a series of radioactive elements with atomic numbers 89 through 103 2Syn|Hyper actinide, actinon group, grouping any number of entities (members) considered as a unit adj having a radial form starfish are actinoid--that is, they are radially symmetrical Syn actinomorphic, actinomorphous capable of division into symmetrical halves by any longitudinal plane passing through the axis |
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