citron /ˈsɪtɹən/noun 4adjective 1forms 3 noun4 •The fruit of a citron tree.To make Sallet of Lemon pill, or green Citron. You must have your Lemon Pill preserved very green, Rasp it into a Dish, and raise it up lightly with a Fork […] — 1682 •The candied rind of the citron fruit. •A small citrus tree, Citrus medica. •A greenish yellow colour, inspired by the color of the rind of the citron fruit. adjective1 •Of a greenish yellow colour. formscitrons · more citron · most citron