synsacrum
English
Etymology
From
syn-
+
sacrum
.
Noun
synsacrum
(
plural
synsacrums
or
synsacra
)
(
anatomy
,
ornithology
)
The
bone
in
birds
composed of the
sacrum
and some
lumbar
or
caudal
vertebrae
fused together.
Derived terms
synsacral