-in Hear it!

-in¹ Definition

-in (in)

  1. a neutral carbohydrate inulin
  2. a glycoside amygdalin
  3. a protein albumin
  4. a glyceride palmitin
  5. an enzyme rennin
  6. an antibiotic streptomycin
  7. an alkaloid or a nitrogenous base codein
  8. a pharmaceutical preparation chrysarobin
  9. a commercial product, material, or mixture algin
  10. an antigen tuberculin

Etymology: see -ine

-in² Definition

-in (in)

any of various mass actions or gatherings of a (specified) type, as a political demonstration or a form of entertainment pray-in, be-in