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English definition of “embryo”

embryo

noun [C] uk   /ˈem.bri.əʊ/ us    /-oʊ/ (plural embryos)
an animal that is developing either in its mother's womb or in an egg, or a plant that is developing in a seed: Between the eighth week of development and birth a human embryo is called a foetus. in embryo formal developing and not yet complete: The department's plans for enlargement are still in embryo.
(Definition of embryo from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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