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