astringent vs smectic

astringent

noun
  • A substance which draws tissue together, thus restricting the flow of blood. 

adj
  • Extremely sour, bitter. 

  • Sharp, caustic, severe. 

  • Causing a dry or puckering mouthfeel; characteristic of foods with high tannin content, such as certain kinds of berries and citrus fruits. 

  • Having the effect of drawing tissue together; styptic. 

smectic

noun
  • A liquid crystal having the molecules aligned in this way. 

adj
  • Astringent; detergent. 

  • Describing a class of liquid crystals whose molecules are aligned in layers, with the molecules lying perpendicular to the plane of the layers. 

  • Cleansing. 

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