orb vs spherule

orb

noun
  • A structural motif or finial in the shape of a sphere 

  • A spherical body; a sphere, especially one of the celestial spheres; a sun, planet, or star 

  • An orbit of an heavenly body 

  • Any revolving circular body, such as a wheel 

  • A sphere of action. 

  • A translucent sphere appearing in flash photography (Orb (optics)) 

  • A blank window or panel. 

  • A body of soldiers drawn up in a circle, as for defence, especially infantry to repel cavalry. 

  • One of the azure transparent spheres conceived by the ancients to be enclosed one within another, and to carry the heavenly bodies in their revolutions 

  • The time period of an orbit 

  • The eye, seen as a luminous and spherical entity 

  • A globus cruciger; a ceremonial sphere used to represent royal or imperial power 

verb
  • To encircle; to surround; to enclose. 

  • To become round like an orb. 

  • To form into an orb or circle. 

spherule

noun
  • A small sphere. 

How often have the words orb and spherule occurred in a corpus of books? (source: Google Ngram Viewer )