Noun
The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebrae more or less consolidated.
Source: Webster's dictionaryThe gluteus maximus has its origin between (and around) the iliac crest and the coccyx from where one part radiates into the iliotibial tract and the other stretches down to the gluteal tuberosity under the greater trochanter. Source: Internet
Yoga refers to this power flowing from the coccyx to Spirit as the awakened kundalini. Source: Internet
The tail has separate vertebrae unlike the fused urostyle or coccyx in modern frogs. Source: Internet