| 单词 | ultrabasic |
| 释义 | ultrabasic[ uhl-truh-bey-sik ] / ˌʌl trəˈbeɪ sɪk / adjective(of rocks) containing iron and magnesium, with little or no silica. Also ultramafic. Origin of ultrabasicFirst recorded in 1890–95; ultra- + basic Words nearby ultrabasicultimo, ultimogeniture, ultisol, ulto., ultra, ultrabasic, ultracentrifuge, ultraclean, ultraconservative, ultracrepidarian, ultracritical Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for ultrabasic
British Dictionary definitions for ultrabasicultrabasic / (ˌʌltrəˈbeɪsɪk) / adjective(of such igneous rocks as peridotite) containing less than 45 per cent silica 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 Scientific definitions for ultrabasicultrabasic [ ŭl′trə-bā′sĭk ] Containing magnesium and iron and only a very small amount of silica. Used of igneous rock, and often used interchangeably with ultramafic. Peridotite is an ultrabasic rock. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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