cross-bone

English

Etymology

From cross +‎ bone, a calque of German Kreuzbein (“sacrum”).

Noun

cross-bone (plural cross-bones)

  1. (obsolete, anatomy) The sacrum.
    • 1879, Ernst Haeckel, “Development of the Organs of Motion”, in The Evolution of Man: A Popular Exposition of the Principal Points of Human Ontogeny and Phylogeny, volume 2, New York: D. Appleton and Company, page 282:
      Next comes the cross-bone (sacrum), which is inserted between the two halves of the pelvic girdle. This cross-bone consists of five fixed and amalgamated cross-vertebræ.

See also
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