英语词汇“protophloem”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	protophloem
释义	protophloem Botany noun The first-formed elements of the primary phloem, the cells of which mature before the elongation of the surrounding plant tissue. Origin Late 19th century; earliest use found in Frederic Bower (1855–1948), botanist. After German Protophloëm.
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protophloem