英语词汇“exine”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	exine
释义	exine enUK ex·ine E0276700 (ĕk′sēn′, -sīn′)n. The outer layer of the wall of a spore or pollen grain. [ex(o)- + Greek īs, īn-, tendon; see wei- in Indo-European roots.] exine (ˈɛksɪn; -aɪn) or extine n (Botany) botany the outermost coat of a pollen grain or a spore. Compare intine ex•ine (ˈɛk sin, -saɪn) n. the outer coat of a pollen grain. [1880–85; perhaps ex-1 + -ine1] Translations Exine enUK exine [′ek‚sēn] (botany) exosporium Exine (also exosporium), in seed plants, the outer layer of the wall of pollen grains (microspores). In many plants the outside of the exine has nodules or reticular enlargements, which form specific patterns characteristic of a particular species and are there fore often used to identify the species to which a pollen grain belongs. exine enUK exine (ĕk′sēn′, -sīn′)n. The outer layer of the wall of a spore or pollen grain. exine the outer coat of a POLLEN GRAIN, that often has protuberances, spines, etc. The exine also has one or more areas where the wall is thin, forming a pore through which the pollen tube will protrude. ThesaurusSeepollen
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更新时间：2024/11/11 22:36:57