-in

Definitions

1. Used, as a modification of -ine, to form the names of a variety of types of compound; examples include proteins (globulin), carbohydrates (dextrin), dyes (alizarin) and others (vanillin).
   morpheme
2. A neutral chemical compound.
   morpheme
3. Attached to a word (usually a verb) to denote a protest, demonstration or other type of gathering characterized by the activity denoted by the base word.
   morpheme
4. An enzyme.
   morpheme
5. An antibiotic.
   morpheme
6. A pharmaceutical product.
   morpheme

Equivalents

Examples

“albumin, casein, chitin, pepsin, saponin”

“renin, pancreatin”

“penicillin, streptomycin”

“cobalamin, niacin, vitamin”

“elf + -in → elfin”

CEFR level