abaxial vs ventral

abaxial

adj
  • Not in the axis. Applied to an embryo placed out of the axis of the seed. 

  • Of a side that is facing away from the axis or central line, such as the underside of a leaf; or the back of an animal. 

ventral

adj
  • On the front side of the human body, or the corresponding surface of an animal, usually the lower surface. 

  • Related to the abdomen or stomach. 

  • On or relating to the bottom portion of either foot and/or hand. 

noun
  • Any of the enlarged and transversely elongated scales that extend down the underside of a snake's body from the neck to the anal scale. 

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