- coccygeal fovea
- postanal dimple
- postanal dimptes
- postanal pit
- 尾: hairs on a horse's tail spik ...
- 小: small; little; petty; minor
- 凹: low-lying area; depression
- 小凹: caveola; dimple; faveolus; fossula; foveola
- 小凹,小凹的: foveolae
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