It is interesting to recall that a spheroid of liquid on a hot plate also possesses a scalloped edge, and it may be that the two phenomena have something in common.
"Liquid Drops and Globules, their Formation and Movements"
Chas. R. Darling
The egg is an elongated oval, compressed almost throughout its entire length, very blunt at both points; a long cone, the apex broadly truncated and rounded off obtusely, sealed on half a very oblate spheroid.
"The Nests and Eggs of Indian Birds, Volume 1"
Allan O. Hume
The earth is a spheroid slightly flattened at the poles.
"Lectures in Navigation"
Ernest Gallaudet Draper