conic vs conoid

conic

adj
  • Synonym of conical 

noun
  • A conic section. 

conoid

adj
  • Shaped like a cone; conical. 

noun
  • Anything shaped like a cone 

  • A Catalan surface all of whose rulings intersect some fixed line 

  • A solid formed by the revolution of a conic section about its axis 

  • The pineal gland 

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