Heterochromia

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Notion

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Science and technology

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What Wikipedia says

Heterochromia is a variation in an animal's coloration, most often a difference in the colors of the left and the right eyes' irises, but also a variation in the color of hair or skin. Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment).

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

Image: Leonardo Micossi Faler, CC BY-SA 3.0, via Wikimedia Commons.