dentigerous vs runcinate

dentigerous

adj
  • Bearing teeth or tooth-like structures; of or pertaining to tissue from which teeth develop. 

runcinate

adj
  • Having tooth-like projections pointing away from the apex. 

  • Having a lacerated aspect with the projection pointing away from the apex, like dandelion leaves. 

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