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Noun: hemal arch
Usage: N. Amer (elsewhere: haemal arch)
  1. A structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels
    "The hemal arch is particularly prominent in the tail vertebrae of fish";
    - haemal arch [Brit, Cdn]

Derived forms: hemal arches

Type of: arch

Part of: centrum

Encyclopedia: Hemal arch