What is the term for a rectilinear parallelepiped?

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Discussion Overview

The discussion revolves around the terminology used for a rectilinear parallelepiped, exploring various names and classifications for this geometric shape. Participants consider different definitions and distinctions based on dimensions and shapes.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants propose that the term "cuboid" could be appropriate, while noting that it differs from the term "spheroid," which has equal dimensions in two axes.
  • One participant suggests alternative terms such as "rectoid" or "rectohedron" without providing definitions.
  • Another participant refers to a "rectangular cuboid" for cases with no repeated dimensions and a "square cuboid" for cases with one repeated dimension, further categorizing these into prolate and oblate types.
  • A later reply indicates that a cuboid can be understood as any polyhedron derived from a cube through stretching or shearing.

Areas of Agreement / Disagreement

Participants do not reach a consensus on a single term for a rectilinear parallelepiped, with multiple competing views and classifications presented.

Contextual Notes

Definitions of terms like "cuboid," "rectangular cuboid," and "square cuboid" may depend on specific contexts or interpretations, and the discussion does not resolve these nuances.

swampwiz
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I guess it could be called a cuboid, but the corresponding circular shape called a spheroid has the dimension in 2 of the axes as the same. Perhaps it is called rectoid or rectohedron?
 
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I'll just refer to the case of no repeated dimensions as cuboid, and with one repeated dimension as square cuboid, which can be of the two types prolate cuboid & oblate cuboid.
 
I'll just refer to the case of no repeated dimensions as rectangular cuboid, and with one repeated dimension as square cuboid, which can be of the two types prolate square cuboid & oblate square cuboid. It seems that a cuboid is any polyhedron that was originally a cube, but with any manner of applied stretch and/or shear.
 

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