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1 In Polyplacophora (chitons), an extension of the mantle beyond the shell plates; it is in contact with the substrate below and often bears spicules on its upper surface.

2 In vertebrates, a group of bones attaching limbs to the trunk: the pectoral girdle attaches the fore limbs, the pelvic girdle the hind limbs.

Subjects: Zoology and Animal Sciences.

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