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n. pl. pri·mor·di·a (-dē-ə)
An organ or a part in its most rudimentary form or stage of development.
[Latin prīmōrdium; see primordial.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n, pl -dia (-dɪə)
(Biology) biology an organ or part in the earliest stage of development
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
pri•mor•di•um(praɪˈmɔr di əm)
n., pl. -di•a (-di ə)
the first recognizable, histologically differentiated stage in the development of an organ.
[1665–75; < Latin prīmōrdium, in pl.: beginnings, elementary stage =prīm(us) first (see prime) + ōrd(īrī) to begin + -ium -ium1; compare exordium]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||primordium - an organ in its earliest stage of development; the foundation for subsequent development|
organ - a fully differentiated structural and functional unit in an animal that is specialized for some particular function
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