-etin, suffixChem.Forming the names of aglycones, esp. those not chemically characterized when discovered and named, usually by replacing -in in the name of the glycoside from which the aglycone is obtained; so fraxetin, phloretin, quercetin.
-etin/ˈɛtɪn/suffix.
ORIGIN: After quercetin.
Forming nouns denoting aglycones, usu. by replacing -in in the name of the glycoside from which the aglycone is obtained, as in phloretin, quercetin, etc.