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Related to primary meristem: secondary meristem
primary meristem[′prī‚mer·ē ′mer·ə‚stem]
Meristem which is derived directly from embryonic tissue and which gives rise to epidermis, vascular tissue, and the cortex.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.