Modius

Modius (plural modii) may refer to:


 * an ancient Roman unit for dry measures, (8.73 L) roughly equivalent to a peck
 * a medieval Roman unit for area, approximately 40 acres
 * Modius (headdress), a type of cylindrical headdress so called for its resemblance to the measure of grain
 * Modius, the family name of the Modia (gens)