a small, triangular bone at the lower end of the vertebral column, formed by the fusion of four rudimentary vertebrae and articulating with the sacrum
Origin of coccyxL, cuckoo from Classical Greek kokkyx ( from kokku, echoic of its cry): so called because shaped like a cuckoo's beak
A small triangular bone at the base of the spinal column in humans and other apes, consisting of several fused rudimentary vertebrae. Also called tailbone .
Origin of coccyxNew Latin coccéx from Greek kokkūx cuckoo, coccyx (from its resemblance to a cuckoo's beak)
From Ancient Greek κόκκυξ (kokkuks, “cuckoo”), referring to the curved shape of a cuckoo's beak when viewed from the side.