| 单词 | protoderm |
| 释义 | protoderm in British English (ˈprəʊtəʊˌdɜːm) noun the layer of meristematic cells from which a plant's epidermis develops protoderm in American English (ˈproutəˌdɜːrm) noun Botany a thin outer layer of the meristem in embryos and growing points of roots and stems, which gives rise to the epidermis Also called: dermatogen Word origin [1930–35; proto- + -derm]This word is first recorded in the period 1930–35. Other words that entered Englishat around the same time include: DNA, acoustic phonetics, cloverleaf, old school tie, saddle stitchproto- is a combining form meaning “first,” “foremost,” “earliest form of,” used in theformation of compound words (protomartyr; protolithic; protoplasm), specialized in chemical terminology to denote the first of a series of compounds,or the one containing the minimum amount of an elementExamples of 'protoderm' in a sentence |
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