SACRUM (sacra)

Pronunciation (US):

(GB):

Irregular inflected form: sacra   

 Dictionary entry overview: What does sacrum mean? 

• SACRUM (noun)
  The noun SACRUM has 1 sense:

1. wedge-shaped bone consisting of five fused vertebrae forming the posterior part of the pelvis; its base connects with the lowest lumbar vertebra and its tip with the coccyx

  Familiarity information: SACRUM used as a noun is very rare.

 Dictionary entry details 

• SACRUM (noun)

Sense 1

Meaning:

Wedge-shaped bone consisting of five fused vertebrae forming the posterior part of the pelvis; its base connects with the lowest lumbar vertebra and its tip with the coccyx

Classified under:

Nouns denoting body parts

Hypernyms ("sacrum" is a kind of...):

bone; os (rigid connective tissue that makes up the skeleton of vertebrates)

Meronyms (parts of "sacrum"):

sacral vertebra (one of 5 vertebrae in the human spine that fuse in the adult to form the sacrum)

Holonyms ("sacrum" is a part of...):

hip; pelvic arch; pelvic girdle; pelvis (the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates)

Derivation:

sacral (of or relating to or near the sacrum)

 Context examples 

One of the five bones situated between the thoracic vertebrae and the sacrum in the lower part of the spine.

(Lumbar Vertebra, NCI Thesaurus)

The majority of cases involve the sacrum or clivus.

(Notochordal Neoplasm, NCI Thesaurus)

The dorsal area between the base of the neck and the sacrum.

(Back, NCI Thesaurus)

Posteriorly it is bounded by the sacrum and coccyx.

(Pelvic Bone, NCI Thesaurus)

The region of the spine in the lower back that consists of the five lumbar vertebrae and the sacrum.

(Lumbosacral Region, NCI Thesaurus)

A group of three muscles (iliocostalis, longissimus, and spinalis) that originate at the sacrum, ilium, and lumbar vertebrae spines and insert into the ribs and vertebra in order to extend the vertebral column.

(Erector Spinae, NCI Thesaurus)

The basin-shaped skeletal structure that is formed by the sacrum and the ilium, ischium, and pubis of each side that supports the trunk and to which the lower extremities attach.

(Pelvic Girdle, NCI Thesaurus)