Cross-bone

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The sacrum. obsolete

    "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."

Example

More examples

"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."

Etymology

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

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.