Meaning of -IN in English

-IN

I. noun suffix

Etymology: French -ine, from Latin -īna, feminine of -īnus of or belonging to — more at -en

1.

a. : neutral chemical compound

insul in

b. : enzyme

pancreat in

c. : antibiotic

penicill in

2. : -ine II,1a, b

epinephr in

3. : pharmaceutical product

niac in

II. noun combining form

Etymology: sit- in

: organized public protest by means of or in favor of : demonstration

teach- in

love- in

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.