commensurable

Concise Oxford English Dictionary © 2008 Oxford University Press:
commensurable /kəˈmɛnʃ(ə)rəb(ə)l, -sjə-/

▶adjective

• 1 measurable by the same standard: the finite is not commensurable with the infinite.

• 2 Mathematics (of numbers) in a ratio equal to a ratio of integers.

– derivatives
commensurability noun,
commensurably adverb.

– origin C16: from late L. commensurabilis, from com- ‘together’ + mensurabilis, from mensurare ‘to measure’.