flagellate vs grex

flagellate

noun
  • Any organism that has flagella. 

adj
  • Resembling a whip. 

  • Having flagella. 

verb
  • Of a spermatozoon, to move its tail back and forth. 

  • To whip or scourge. 

grex

noun
  • A multicellular aggregate of amoeba. 

  • A kind of group used in horticultural nomenclature, applied to the progeny of an artificial cross from specified parents, in particular for orchids. 

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