Relating to the scientific study of how organisms develop from a single cell into a complex living being.
From embryology (Greek embryon 'unborn creature' + -logia 'study of') plus the adjectival suffix -ical. The root embryon comes from en- 'in' and bryein 'to swell.'
Embryological research revealed that humans, fish, and chickens all start with nearly identical body plans, which was mind-blowing evidence that we all share a common ancestor.
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