Term: chitin: a tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi
Broader: carbohydrate: an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Unrelated: parade: an extended (often showy) succession of persons or things
Broader: carbohydrate: an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Unrelated: medium: a liquid with which pigment is mixed by a painter