Definition that contains surface area
- are a unit of surface area equal to 100 square meters
- ar a unit of surface area equal to 100 square meters
- intussusception (biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall
- hectare (abbreviated `ha') a unit of surface area equal to 100 ares (or 10,000 square meters)
- erasure a surface area where something has been erased
- spandrel an approximately triangular surface area between two adjacent arches and the horizontal plane above them
- spandril an approximately triangular surface area between two adjacent arches and the horizontal plane above them
- coefficient of drag the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body
- drag coefficient the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body