Dictionary

1-in

noun suffix

Definition of -IN

1
a :  neutral chemical compound <insulin>
b :  enzyme <pancreatin>
c :  antibiotic <penicillin>
2
:  2-ine 1a, b <epinephrin>
3
:  pharmaceutical product <niacin>

Origin of -IN

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

2-in

noun combining form

Definition of -IN

:  organized public protest by means of or in favor of :  demonstration <teach-in> <love-in>

Origin of -IN

sit-in
Medical Dictionary

-in

noun suffix \ən, ən, ˌin\

Medical Definition of -IN

1
a :  neutral chemical compound <insulin> b :  enzyme <pancreatin> c :  antibiotic <penicillin>
2
:  pharmaceutical product <niacin>
July 01, 2015
precarious Hear it
not certain, secure, or steady
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