EMBRYO

[noun] [C] [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 seedembryo research/experimentationa seed embryoBetween the eighth week of development and birth a human embryo is called a foetus.A human embryo up to the age of 14 days is sometimes called a pre-embryo.The department's plans for enlargement are still in embryo (= haven't been put into action yet) because of the university's spending cuts.