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Backbone

usgb/ˈbækbəʊn/Volume
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Physical Structure

Refers to the actual bones within the body, often mentioned in medical or injury contexts.

Illustration for Physical Structure
The X-ray showed she had fractured her backbone.
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Not The Surface

Used to talk about the inner structure, not external back muscles or skin.

Illustration for Not The Surface
Old age can lead to issues with one's backbone due to osteoporosis.
Visual representation of the word "Backbone"

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