• synonyms


[ sin-sak-ruh m, -sey-kruh m ]
/ sɪnˈsæk rəm, -ˈseɪ krəm /

noun, plural syn·sac·ra [sin-sak-ruh, -sey-kruh] /sɪnˈsæk rə, -ˈseɪ krə/. Ornithology.

a dorsal ridge of bone in the pelvic region of birds, formed by the fusion of certain thoracic, lumbar, sacral, and caudal vertebrae.

Nearby words

synovitis, synovitis sicca, synovium, synpolydactyly, synroc, synsacrum, synsepalous, syntactic, syntactic construction, syntactics, syntagma

Origin of synsacrum

First recorded in 1900–05; syn- + sacrum
Related formssyn·sa·cral, adjectivepre·syn·sa·cral, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019