1. also -in A chemical substance, especially:
a. Halogen: bromine.
b. Basic compound: amine.
c. Alkaloid: quinine.
2. Amino acid: glycine.
3. A mixture of compounds: gasoline.
4. Commercial material: glassine.
[Ultimately from Latin -īnus and -inus, adj. suffixes; see -INE1.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.