(idiomatic) A child who returns home from school to an empty house and therefore must unlock/unlatch the exterior door with a key, especially a child of working or absent parent(s).

(organic chemistry) An unsaturated fatty acid having 20 carbon atoms and one double bond

plural of epipteric

Any of a family of organic compounds used as yellow pigments, obtained by azo coupling of aniline and acetoacetanilide or their derivatives.