structural in Wingdings is ⬧︎⧫︎❒︎◆︎♍︎⧫︎◆︎❒︎♋︎●︎

Of or pertaining to organit structure; as, a structural elementor cell; the structural peculiarities of an animal or a plant.Structural formula. (Chem.) See Rational formula, under Formula.empirical formula.