Relating to or affecting gills or gill-like structures; involving the respiratory organs of aquatic animals.
From branchia (gill) + -al (adjective suffix), creating a word to describe anything connected to gills. Used in anatomy and zoology since the 18th century.
Humans have branchial arches hidden in our embryos—these structures evolved from fish gills and become our jaws and ear bones, proving we're literally descended from fish with gills.
Complete word intelligence in one call. Free tier — 50 lookups/day.