Commensurability

Two concepts or things are commensurable if they are measurable or comparable by a common standard.

Commensurability most commonly refers to commensurability (mathematics). It may also refer to:

• Commensurability (astronomy), whether two orbital periods are mathematically commensurate.
• Commensurability (crystal structure), whether periodic material properties repeat over a distance that is mathematically commensurate with the length of the unit cell.
• Commensurability (economics), whether economic value can always be measured by money
• Commensurability (ethics), the commensurability of values in ethics
• Commensurability (group theory), when two groups have a subgroup of finite index in common
• Commensurability (philosophy of science)
• Commensurability (physics), a concept in dimensional analysis that concerns conversion of units of measurement
  • Apples and oranges, common idiom related to incommensurability

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