coccyx
noun [ C ] anatomy specialized uk/ˈkɒk.sɪks/ us/ˈkɑːk.sɪks/ coccyxes or coccyges uk/ˈkɒk.saɪ.dʒiːz/ us/ˈkɑːk.saɪ.dʒiːz/
尾骨,尾椎
a small bone at the base of the spine of humans and some apes
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