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fibular

noun, plural fib·u·lae [fib-yuh-lee] /ˈfɪb yəˌli/, fib·u·las.

Anatomy. the outer and thinner of the two bones of the human leg, extending from the knee to the ankle.
Zoology. a corresponding bone, often rudimentary or ankylosed with the tibia, of the leg or hind limb of an animal.
a clasp or brooch, often ornamented, used by the ancient Greeks and Romans.

noun plural -lae (-ˌliː) or -las

the outer and thinner of the two bones between the knee and ankle of the human legCompare tibia
the corresponding bone in other vertebrates
a metal brooch resembling a safety pin, often highly decorated, common in Europe after 1300 bc

1670s, “clasp, buckle, brooch;” 1706 as “smaller bone in the lower leg,” from Latin fibula “clasp, brooch,” related to figere “to fasten, fix” (see fix (v.)).

Used in reference to the outer leg bone as a loan-translation of Greek perone “small bone in the lower leg,” originally “clasp, brooch; anything pointed for piercing or pinning;” the bone was so called because it resembles a clasp like a modern safety pin.

n. pl. fib•u•las

The outer, narrower, and smaller of the two bones of the human lower leg, extending from the knee to the ankle, and articulating with the tibia above and the tibia and talus below.calf bone

Plural fibulae (fĭb′yə-lē′) fibulas

The smaller of the two bones of the lower leg or lower portion of the hind leg. See more at skeleton.