英语词汇perisperm怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

　

单词	perisperm
释义	Definition of perisperm in English: perisperm noun ˈpɛrɪspəːm Botany (in some seeds) a mass of nutritive material outside the embryo sac. 〔植〕（某些种子的）外胚乳 Example sentencesExamples The perisperm is present in abundance. In cucumber, muskmelon, and other seeds, a thin perisperm-endosperm envelope completely encloses the embryo. Scarification was accomplished by piercing the seed coat and scraping a small portion of the perisperm with a sterile dissecting needle. They were treated with 65% sulfuric acid for 10 min at room temperature to hydrolyse their impermeable waterproofing perisperm. Almost all of the seeds have popped along their long axis due to the swelling of the starchy perisperm during heating. Origin Early 19th century: from peri- 'around' + Greek sperma 'seed'.
随便看	the opposite sex the opposition the opposition the opposition the Opposition the optative the optative theor theorbist theorbo theorboed theorbo-lute theorbos theorbo stop the order the order the order of the day the order of the day the ordinary the ordinary the Ordinary the ordinary people the ordovician the ordovician theorem

　

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更新时间：2024/10/19 8:57:10