Area vs. Planimeter — What's the Difference?

Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object.

A planimeter, also known as a platometer, is a measuring instrument used to determine the area of an arbitrary two-dimensional shape.

A roughly bounded part of the space on a surface; a region:a farming area; the New York area.

An instrument that measures the area of a plane figure as a mechanically coupled pointer traverses the perimeter of the figure.

A surface, especially an open, unoccupied piece of ground:a landing area; a playing area.

An integrating device used to measure the area of an irregular figure via tracing its outline.

A distinct part or section, as of a building, set aside for a specific function:a storage area in the basement.

An instrument for measuring the area of any plane figure, however irregular, by passing a tracer around the bounding line; a platometer.

A division of experience, activity, or knowledge; a field:studies in the area of finance; a job in the health-care area.

A measuring instrument for measuring the area of an irregular plane figure

An open, sunken space next to a building; an areaway.

Abbr. AThe extent of a planar region or of the surface of a solid measured in square units.

(mathematics) A measure of the extent of a surface; it is measured in square units.

A particular geographic region.

Any particular extent of surface, especially an empty or unused extent.

The extent, scope, or range of an object or concept.

(British) An open space, below ground level, giving access to the basement of a house, and typically separated from the pavement by railings.

(soccer) Penalty box; penalty area.

(slang) Genitals.

Any plane surface, as of the floor of a room or church, or of the ground within an inclosure; an open space in a building.

The inclosed space on which a building stands.

The sunken space or court, giving ingress and affording light to the basement of a building.

An extent of surface; a tract of the earth's surface; a region; as, vast uncultivated areas.

The superficial contents of any figure; the surface included within any given lines; superficial extent; as, the area of a square or a triangle.

A spot or small marked space; as, the germinative area.

Extent; scope; range; as, a wide area of thought.

A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography);

A particular environment or walk of life;

A subject of study;

A part of a structure having some specific characteristic or function;

A part of an animal that has a special function or is supplied by a given artery or nerve;

The extent of a 2-dimensional surface enclosed within a boundary;