pinbone

/ˈpɪnˌboʊn/
noun
  1. A small, thin bone in a fish, especially one that runs along the side of the fish's body; also called a pin bone.
    • Be careful when eating trout; it has many tiny pinbones.
    • She felt a pinbone in her mouth and carefully pulled it out.
    • The chef removed the pinbones from the salmon fillet before cooking.
Synonyms