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Definition of Cuboid bone

Cuboid bone: The cube-shaped outer bone in the instep of the foot. The cuboid bone has a joint in back that allows it to articulate posteriorly with the calcaneus (the heel bone). It also has a joint in the front that permits it to articulate anteriorly with the fourth and fifth metatarsals (the bones just behind the fourth and fifth toes).

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=9014
Last Editorial Review: 3/19/2012

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