Lignite

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.

At a glance

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Notion

Domain

Science and technology

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What Wikipedia says

Lignite (from Latin lignum 'wood'), often called brown coal, is a soft, brown, combustible sedimentary rock formed from naturally compressed peat. It has a carbon content around 25–35% and is considered the lowest rank of coal due to its relatively low heat content.

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

Image: Prissantenbär, CC BY-SA 3.0, via Wikimedia Commons.