# fibula

/ˈfɪbjəɫə/ (US) · /fˈɪbjʊlɐ/ (UK) · CEFR C2 · Noun

Source: https://englishreference.com/word/fibula
Updated: 2026-10-19

## Definition

the thin outer bone in your lower leg, next to the bigger tibia bone.

For teachers: the slender lateral bone of the lower leg, running parallel to the tibia from knee to ankle.

## Examples

- The fibula runs along the outside of your lower leg.
- The doctor said she broke her fibula while playing football and needs a boot for six weeks.
- Although the tibia bears most of the body's weight, the fibula provides crucial stability to the ankle joint and serves as an anchor for several muscles.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.