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3 dictionary results for: embryos
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
em·bry·o       [em-bree-oh] Pronunciation Key noun, plural -os, adjective
–noun
1.the young of a viviparous animal, esp. of a mammal, in the early stages of development within the womb, in humans up to the end of the second month. Compare fetus.
2.Botany. the rudimentary plant usually contained in the seed.
3.any multicellular animal in a developmental stage preceding birth or hatching.
4.the beginning or rudimentary stage of anything: He charged that the party policy was socialism in embryo.
–adjective
5.embryonic.
[Origin: 1580–90; < ML embryon-, embryo < Gk émbryon, n. use of neut. of émbryos ingrowing, equiv. to em- em-2 + bry- (s. of brýein to swell) + -os adj. suffix]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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American Heritage Dictionary - Cite This Source - Share This
em·bry·o       (ěm'brē-ō')  Pronunciation Key 
n.   pl. em·bry·os
    1. An organism in its early stages of development, especially before it has reached a distinctively recognizable form.
    2. An organism at any time before full development, birth, or hatching.
    3. The fertilized egg of a vertebrate animal following cleavage.
    4. In humans, the prefetal product of conception from implantation through the eighth week of development.
    1. The fertilized egg of a vertebrate animal following cleavage.
    2. In humans, the prefetal product of conception from implantation through the eighth week of development.
  3. Botany The minute, rudimentary plant contained within a seed or an archegonium.
  4. A rudimentary or beginning stage: "To its founding fathers, the European [Economic] Community was the embryo of the United States of Europe" (Economist).


[Medieval Latin embryō, from Greek embruon : en-, in; see en-2 + bruein, to be full to bursting.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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The American Heritage Science Dictionary - Cite This Source - Share This
embryo       (ěm'brē-ō')  Pronunciation Key 
  1. 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.
  2. The developing young of an egg-laying animal before hatching.
  3. The sporophyte of a plant in its earliest stages of development, such as the miniature, partially developed plant contained within a seed before germination.

embryonic adjective (ěm'brē-ŏn'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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What Is An Embryo?
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