单词	Iceland spar
释义	Iceland spar /ˈʌɪslənd / noun [mass noun] A transparent variety of calcite, showing strong double refraction.Nodules filled with clear double-refractive Iceland spar with celadonite inclusions have also been found here.... The large, transparent crystals known as Iceland spar, however, are pure calcite. Certain crystals will split incoming light into two separate rays; Iceland spar is one such crystal, as are calcite and quartz.
随便看	noscitur a sociis no-score draw nose nosean noseane nosebag noseband nose bit nosebleed nosebleeder nose-bleeding nose candy nose cap nose clip nose cone nose count nose-counting nosed nosedive nose door nose-down nose-drive nose-driven nose drops nose-end

英语词典包含243303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。