- pertaining to or in the state of an embryo.
- rudimentary; undeveloped.
Also em·bry·o·nal [em-bree-uh-nl, em-bree-ohn-l] /ˈɛm bri ə nl, ˌɛm briˈoʊn l/.
Origin of embryonic
SynonymsSee more synonyms on Thesaurus.com
2. underdeveloped, immature, unfinished.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for embryonic
The 2012 Republican Platform still states definitively: “We oppose federal funding of embryonic stem cell research.”The Artificial Womb Will Change Feminism Forever
August 12, 2014
Imagine a future secretary appointed by a president who objects to, say, embryonic stem-cell research.Obama Lets Politics Trump Science in Plan B Fight
April 6, 2012
ACT, too, “remains committed to embryonic stem2cell research,” said Lanza.After Geron, Stem Cells’ New Saviors
November 18, 2011
There are over 3,000 Americans who die every day from diseases that could be treated with embryonic stem-cell therapies.Saving Sight, Testing Faith
May 16, 2011
The one-legged Vietnam vet is serving as chairman of the Senate committee overseeing the Embryonic Stem Cell Bill.Natalie Portman's Dad's Bizarre Novel
April 26, 2011
The caterpillar and the chrysalis belong to the embryonic period.The Sexual Question
As the subject for observation he chose the blood of embryonic mice.Histology of the Blood
It signifies springing into being or life from an embryonic condition.The Sacred Formulas of the Cherokees
It is an embryonic form, and therefore inferior in rank to the Tau moth.Our Common Insects
Alpheus Spring Packard
The embryonic human being has been steadily increasing in size, meanwhile.Sex
- of or relating to an embryo
- in an early stage; rudimentary; undeveloped
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
Word Origin and History for embryonic
Online Etymology Dictionary, © 2010 Douglas Harper
- Of, relating to, or being an embryo.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- An animal in its earliest stage of development, before all the major body structures are represented. In humans, the embryonic stage lasts through the first eight weeks of pregnancy. In humans, other placental mammals, and other viviparous animals, young born as embryos cannot thrive. In marsupials, the young are born during the embryonic stage and complete their development outside the uterus, attached to a teat within the mother's pouch.
- The developing young of an egg-laying animal before hatching.
- The sporophyte of a plant in its earliest stages of development, such as the miniature, partially developed plant contained within a seed before germination.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.