**Com*men"su*ra*ble** (?), a. [L. *commensurabilis*; pref. *com-* + *mensurable*. See Commensurate, and cf. Commeasurable.]

Having a common measure; capable of being exactly measured by the same number, quantity, or measure.

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*Com*men"su*ra*ble*ness*, n.

Commensurable numbers ∨ quantities Math., those that can be exactly expressed by some common unit; thus a foot and yard are *commensurable**, since both can be expressed in terms of an inch, one being 12 inches, the other 36 inches. -- Numbers, ∨ Quantities, commensurable in power, those whose squares are commensurable.
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*© Webster 1913.*