Egg-and-dart or Egg-and-tongue is an ornamental device often carved in wood, stone, or plaster quarter-round ovolo mouldings, consisting of an egg-shaped object alternating with an element shaped like an arrow, anchor or dart. Egg-and-dart enrichment of the ovolo molding of the Ionic capital is found in Ancient Greek architecture at the Erechtheion and was used by the Romans.[1]
This design motif has been common in the classical architecture of Europe since the Renaissance.
Don Henley of the rock group The Eagles in "Waiting in the Weeds", on their 2007 release, Long Road Out Of Eden, makes reference to "the tide's eternal tune, the phases of the moon, the chambers of the heart, the egg-and-dart."