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| the largest tarsal bone, forming the prominence of the heel. |
| the basinlike cavity in the lower part of the trunk of many vertebrates, formed in humans by the innominate bones, sacrum, etc. |
xerosis xe·ro·sis (zĭ-rō'sĭs)
n. pl. xe·ro·ses (-sēz)
Abnormal dryness, especially of the skin, eyes, or mucous membranes.
The normal hardening of aging tissue.