juglandaceae: trees having usually edible nuts: butternuts; walnuts; hickories; pecans
dicot family: family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination
big-bang theory: (cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature