Try Our Apps


The Best Internet Slang


[prahy-mawr-dee-uh m] /praɪˈmɔr di əm/
noun, plural primordia
[prahy-mawr-dee-uh] /praɪˈmɔr di ə/ (Show IPA).
the first recognizable, histologically differentiated stage in the development of an organ.
Origin of primordium
1665-75; < Latin prīmōrdium, in plural: beginnings, elementary stage, equivalent to prīm(us) first (see prime) + ōrd(īrī) to begin + -ium -ium; cf. exordium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for primordium
Historical Examples
British Dictionary definitions for primordium


noun (pl) -dia (-dɪə)
(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
Cite This Source
primordium in Medicine

primordium pri·mor·di·um (prī-môr'dē-əm)
n. pl. pri·mor·di·a (-dē-ə)
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.
Cite This Source

Word of the Day

Difficulty index for primordium

Some English speakers likely know this word

Word Value for primordium

Scrabble Words With Friends

Nearby words for primordium