coat vs ectoderm

coat

noun
  • The fur or feathers covering an animal's skin.ᵂᵖ 

  • Canvas painted with thick tar and secured round a mast or bowsprit to prevent water running down the sides into the hold (now made of rubber or leather). 

  • A covering of material, such as paint.ᵂᵖ 

  • A coat of arms.ᵂᵖ 

  • An outer garment covering the upper torso and arms.ᵂᵖ 

  • The habit or vesture of an order of men, indicating the order or office; cloth. 

  • A coat card. 

verb
  • To cover like a coat. 

  • To cover with a coating of some material. 

ectoderm

noun
  • Outermost of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the epidermis (skin) and nervous system of the adult. 

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