spherical nucleus

Flakes were shown to have instant nucleation, where flowers have a spherical nucleus.

Unlike the magic numbers 2-126, which are realized in spherical nuclei, theoretical calculations predict that nuclei in the island of stability are deformed.

(The next lighter doubly magic spherical nucleus is lead-208, the heaviest known stable nucleus and most stable heavy metal.)

Simple cuboidal cells are found in single rows with their spherical nuclei in the center of the cells and are directly attached to the basal surface.

The gustatory (taste) cells, a chemoreceptor, occupy the central portion of the bud; they are spindle-shaped, and each possesses a large spherical nucleus near the middle of the cell.

But theory predicts that the tunneling rate for protons escaping from football-shaped nuclei should be different from the rate of protons tunneling out of spherical nuclei.

Then look at the stuff the planet is made of, and we get down to molecules, which are like even smaller spheres, and then atoms, which seem to be spherical shells surrounding spherical nuclei.