D defs.my
Entry 1 sense Webster, 1913

Retinic

· Re·tin·ic · IPA
01 a. Of or pertaining to resin; derived from resin; specifically, designating an acid found in certain fossil resins and hydrocarbons.
  1. 1.
    Of or pertaining to resin; derived from resin; specifically, designating an acid found in certain fossil resins and hydrocarbons.(Min. Chem.)