Definition of "eggy"

Skeletal similarities are only part of the story Dr. Shubin wants to tell. He also looks at genetics, because our genes provide a historical record, just as fossils do. For instance, we have yolk-making genes, though they’re no longer active, because some of our ancestors laid eggs. “We carry the genetic signature of our eggy past,” this accessible scientist says.

2014, Neil Genzlinger, ‘Your Inner Fish’ Traces Human Evolutionary History on PBS