英语词汇“medullary ray”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

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单词	medullary ray
释义	Definition of medullary ray in English: medullary ray noun Botany Each of the sheets of tissue in the stem of a dicotyledonous plant that extend radially from the pith to the cortex between the vascular bundles (also called primary ray); (formerly also) †a secondary ray, in the secondary vascular tissue of a plant (obsolete). Origin Early 19th century; earliest use found in Patrick Keith (1769–1840). Definition of medullary ray in US English: medullary ray noun Botany Each of the sheets of tissue in the stem of a dicotyledonous plant that extend radially from the pith to the cortex between the vascular bundles (also called primary ray); (formerly also) †a secondary ray, in the secondary vascular tissue of a plant (obsolete). Origin Early 19th century; earliest use found in Patrick Keith (1769–1840).
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更新时间：2026/8/30 3:42:16