- the first recognizable, histologically differentiated stage in the development of an organ.
Origin of primordium
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Examples from the Web for primordium
Historical Examples of primordium
According to the author, anlage may be variously rendered as rudiment, inception or primordium.
- biology an organ or part in the earliest stage of development
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
- An aggregation of cells in the embryo indicating the first trace of an organ or structure.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.