branchial groove

branchial groove

noun Embryology.
one of a series of rudimentary depressions on the surface of the embryo between adjacent branchial arches, homologous to the branchial clefts of gill-breathing ancestral forms.
Also called visceral groove.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Branchial groove is always a great word to know.
So is zedonk. Does it mean:
a gadget; dingus; thingumbob.
the offspring of a zebra and a donkey.
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