Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Medieval Latin
Origin: Greek embryon, from bryein 'to swell'

embryo

 noun
     
Related topics: Biology, Birth
em‧bry‧o plural embryos [countable]
1MB an animal or human that has not yet been born, and has just begun to develop [↪ foetus]
2

in embryo

at a very early stage of development:
The system already exists in embryo.
Definition from the Longman Dictionary of Contemporary English
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