-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 <
insulin
>
b. enzyme <
pancreatin
>
c. antibiotic <
penicillin
>
2. -ine II,1a, b <
epinephrin
>
3. pharmaceutical product <
niacin
>
II. noun combining form Etymology: sit-in organized public protest by means of or in favor of ; demonstration <
teach-in
>
<
love-in
>

New Collegiate Dictionary. 2001.

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