单词 | meristem |
释义 | meristem[ mer-uh-stem ] / ˈmɛr əˌstɛm / noun Botany.embryonic tissue in plants; undifferentiated, growing, actively dividing cells. Origin of meristem1870–75; <Greek merist(ós) divided, distributed (equivalent to *merid-, stem of merízein to divide into parts (derivative of méris part, share) + -tos verbal adjective suffix) + -em<Greek -ēma termination of nouns denoting result of action; cf. -eme Words nearby meristemmering, meringue, merino, Merionethshire, merisis, meristem, meristematic, meristic, merit, merit badge, meritocracy Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for meristemmeristem / (ˈmɛrɪˌstɛm) / nouna plant tissue responsible for growth, whose cells divide and differentiate to form the tissues and organs of the plant. Meristems occur within the stem (see cambium) and leaves and at the tips of stems and roots Derived forms of meristemmeristematic (ˌmɛrɪstɪˈmætɪk), adjectiveWord Origin for meristemC19: from Greek meristos divided, from merizein to divide, from meris portion Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for meristemmeristem [ (mer-i-stem) ] The region on a plant where division of cells (and hence growth) occurs. Usually, meristems are found in the shoots and root tips, and places where branches meet the stem. In trees, growth occurs in the cambium — the layer just beneath the bark. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Scientific definitions for meristemmeristem [ mĕr′ĭ-stĕm′ ] Plant tissue whose cells actively divide to form new tissues that cause the plant to grow. The originally undifferentiated cells of the meristem can produce specialized cells to form the tissues of roots, leaves, and other plant parts. The meristem includes the growing tips of roots and stems (the apical meristems) and the tissue layer known as cambium. Other words from meristemmeristematic adjective (mĕr′ĭ-stə-măt′ĭk)The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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