| 单词 | protoactinium |
| 释义 | protoactinium[ proh-toh-ak-tin-ee-uhm ] / ˌproʊ toʊ ækˈtɪn i əm / noun Chemistry.protactinium. Words nearby protoactiniumprotist, Protista, protistology, protium, proto-, protoactinium, Proto-Algonquian, protoavis, protocal, protochordate, protocol Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for protoactiniumprotoactinium / (ˌprəʊtəʊækˈtɪnɪəm) / nounthe former name of protactinium Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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