Elastance unit is a term used in physics and engineering, which refers to the measure of a material's ability to resist deformation when a force is applied. There are several synonyms for this term, including "elastic modulus," "modulus of elasticity," "Young's modulus," and "stiffness coefficient." These terms describe the same fundamental concept and are used interchangeably in the field of mechanics to describe the physical properties of materials like metals and polymers. The elastance unit is expressed in units of force per unit area, such as Newtons per square meter or Pascals, and is a fundamental property of materials that define how they respond to stress.