embryo Get Printable Handwriting (em-bry-o) 3 syllables Learn It! Spelling Test Definition noun. an animal or plant that is just starting to develop. It grows inside an egg a seed or its mother. Example Sentence By two months the embryo is about the size of a grain of rice. Synonyms fetus; egg; nucleus organism Antonyms fully grown animal; fully grown plant Share with your friends:
