Cotyledon

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

A cotyledon ( KOT-ih-LEE-dən) is a "seed leaf" – a significant part of the embryo within the seed of a plant – and is formally defined as "the embryonic leaf in seed-bearing plants, one or more of which are the first to appear from a germinating seed." Botanists use the number of cotyledons present as one characteristic to classify the flowering plants (angiosperms): species with one cotyledon are called monocotyledonous ("monocots"); plants with two embryonic leaves are termed dicotyledonous ("dicots").

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

Image: w:User:Pengo, CC BY-SA 3.0, via Wikimedia Commons.