Fin

Rarity: Common

The most frequent rarity: most Wikipedia articles become Commons.

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At a glance

Class

Notion

Domain

Science and technology

In collections

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What Wikipedia says

A fin is a thin appendage or component attached to a larger body or structure. Fins typically function as foils that produce lift or thrust, or provide the ability to steer or stabilize motion while traveling in water, air, or other fluids.

Excerpt from the Wikipedia article “Fin”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: ILA-boy, Modification based on Image:Streamlines around a NACA 0012.svg by User:Michael Belisle, Public domain, via Wikimedia Commons.