1. A collection of small bones at the extremity of the backbone, shaped like the cuckoo's beak.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• cocyx,
• coxyx,
• coccxx,
• coxxyx,
• coccah,
• coccy,
• coccod,
• xoccyx,
• voccyx,
• foccyx,
• doccyx,
• ciccyx,
• ckccyx,
• clccyx,
• cpccyx,
• c0ccyx,
• c9ccyx,
• coxcyx,
• coccyxs,
• cocikx

• cocos,
• coccus,
• cocus,
• cosec.

The adjective form of the word "coccyx" is "coccygeal".

The plural of the "coccyx" can be the "coccyxes".

The singular of the "coccyx" can be the "coccyx".