DictionaryRoot: kokkyx
Greek
kokkyx
cuckoo
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noun
coccyx
KOK-siks/ˈkɑːksɪks/
The small triangular bone at the base of the spine.
Etymology
Greek kokkyx means “cuckoo.” Galen applied the name to the fused bones at the spine’s base because they supposedly resembled a cuckoo’s moderately curved beak.