What is the difference between Spandrel and Pier?

The difference between spandrel and pier

is that "spandrel" is the space between the outer curve of an arch and a straight-sided figure that bounds it; the space between two contiguous arches and a straight feature above them and "pier" is a raised platform built from the shore out over water, supported on piles; used to secure, or provide access to shipping; a jetty.

spandrel

pier

Noun

  • (architecture) The space (often more or less triangular) between the outer curve of an arch (the extrados) and a straight-sided figure that bounds it; the space between two contiguous arches and a straight feature above them.
  • (architecture) Horizontal member between the windows of successive storeys of a tall building.
  • (architecture) The triangular space under a stair; the material that fills the space.
  • An oriental rug having a pattern of arches; the design in the corners of such a rug, especially in a prayer rug.
  • (evolutionary theory) A phenotypic characteristic that evolved as a side effect of an adaptation in response to evolutionary pressure.

Exemple

  • Coordinate term: pendentive
  • Another type of theory emphasises the sometimes accidental nature of evolution. A spandrel is a structure arising as a by-product of some other architectural configuration. In evolutionary terms, a spandrel is some trait of an organism which emerges not through direct adaptionist or exaptationist means, but rather as a side effect of some other evolutionary development.

Noun

  • A raised platform built from the shore out over water, supported on piles; used to secure, or provide access to shipping; a jetty.
  • A similar structure, especially at a seaside resort, used to provide entertainment.
  • (US, nautical) A structure that projects tangentially from the shoreline to accommodate ships; often double-sided.
  • A structure supporting the junction between two spans of a bridge.
  • (architecture) A rectangular pillar, or similar structure, that supports an arch, wall or roof, or the hinges of a gate.