-in

I

chem. mir aff. a noun suffix used in chemical nomenclature (glycerin; acetin). In spelling, usage wavers between -in and -ine. In chemistry a certain distinction of use is attempted, basic substances having the termination -ine rather than -in (ammine; aniline), and -in being restricted to certain neutral compounds, glycerides, glucosides, and proteids (albumin), but this distinction is not always observed

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Etymology: < NL -ina. See -ine II II

-in

cvb aff. a suffixal use of the adverb in, extracted from sit-in, forming nouns, usu. from verbs, referring to organized protests through or in support of the named activity (kneel-in; pray-in) or, more generally, to any organized social or cultural activity (cook-in; sing-in)