Definition of Vertebra. Meaning of Vertebra. Synonyms of Vertebra
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Definition of Vertebra
VertebraVertebra Ver"te*bra, n.; pl. Vertebr[ae]. [L. vertebra, fr.
vertere to turn, change. See Verse.]
1. (Anat.) One of the serial segments of the spinal column.
Note: In many fishes the vertebr[ae] are simple cartilaginous
disks or short cylinders, but in the higher vertebrates
they are composed of many parts, and the vertebr[ae] in
different portions of the same column vary very
greatly. A well-developed vertebra usually consists of
a more or less cylindrical and solid body, or centrum,
which is surmounted dorsally by an arch, leaving an
opening which forms a part of the canal containing the
spinal cord. From this dorsal, or neural, arch spring
various processes, or apophyses, which have received
special names: a dorsal, or neural, spine, spinous
process, or neurapophysis, on the middle of the arch;
two anterior and two posterior articular processes, or
zygapophyses; and one or two transverse processes on
each side. In those vertebr[ae] which bear
well-developed ribs, a tubercle near the end of the rib
articulates at a tubercular facet on the transverse
process (diapophysis), while the end, or head, of the
rib articulates at a more ventral capitular facet which
is sometimes developed into a second, or ventral,
transverse process (parapophysis). In vertebrates with
well-developed hind limbs, the spinal column is divided
into five regions in each of which the vertebr[ae] are
specially designated: those vertebr[ae] in front of, or
anterior to, the first vertebra which bears ribs
connected with the sternum are cervical; all those
which bear ribs and are back of the cervicals are
dorsal; the one or more directly supporting the pelvis
are sacral and form the sacrum; those between the
sacral and dorsal are lumbar; and all those back of the
sacral are caudal, or coccygeal. In man there are seven
cervical vertebr[ae], twelve dorsal, five lumbar, five
sacral, and usually four, but sometimes five and rarely
2. (Zo["o]l.) One of the central ossicles in each joint of
the arms of an ophiuran.
Meaning of Vertebra from wikipedia
- In the vertebrate spinal
column, each vertebra
is an irregular
bone with a complex structure composed
of bone and some hyaline
cartilage, the proportions...
- thoracic vertebra
than the first thoracic vertebra
The thoracic spinal nerve
3 (T3) p****es out underneath
it. The fourth thoracic vertebra
- In tetrapods, cervical vertebrae
) are the vertebrae
of the neck, immediately below
the skull. Truncal vertebrae
(divided into thoracic...
- vertebrae. The fifth vertebra contains certain
below. As with other
vertebrae, each lumbar vertebra consists
of a vertebral...
- axis (second cervical vertebra
) at the apex of the odontoid process
or dens and ends at the middle
of the second thoracic vertebra
; it is the least
- A limbus vertebra
is a bone tubercle formed
by bone trauma
on a vertebral
a radiographic similarity
to a vertebral
fracture. The anterior-superior...
, a bone in the spinal column
of a vertebrate animal Vertebra
(software), an environment
for developing distributed
- In anatomy, the atlas
(C1) is the most superior
(first) cervical vertebra
of the spine
and is located
in the neck. It is named
of Gr**** mythology...
- six vertebrae
or segments, not five. This sixth lumbar vertebra
as a transitional vertebra
the sacrum appears
to have only four segments...
- In anatomy, the second cervical vertebra
(C2) of the spine
the axis (from Latin
axis, "axle") or epistropheus. By the atlanto-axial joint, it...
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