Added 10 October 2026 embryology noun Categories: Mind & IdeasRare Words noun ! Definition from WordNet 3.1, Princeton University. More about embryology at Wordnik → Where our words come from → The branch of biology that studies the formation and early development of living organisms. Related Words: fetologyoologyosteologyechinologyspermatologyovologyetymol.ornithologyhymenologyorganologysemenologyhematology Back to today's word