| 单词 | porphyroblast |
| 释义 | porphyroblast[ pôr-fîr′ə-blăst′ ] A large crystal that is surrounded by a finer-grained matrix in a metamorphic rock. Porphyroblasts form by the recrystallization of existing mineral crystals during metamorphism. They are analogous to phenocrysts in igneous rock. Words nearby porphyroblastporphyrinogen, porphyrinuria, porphyritic, porphyrization, porphyrize, porphyroblast, porphyrogenite, porphyroid, porphyropsin, porphyry, porpoise The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
| 随便看 |
英语词典包含192737条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。