Glochid

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

Glochids or glochidia (sing.: "glochidium") are hair-like spines or short prickles, generally barbed, found on the areoles of cacti in the sub-family Opuntioideae. Cactus glochids easily detach from the plant and lodge in the skin, causing irritation upon contact.

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

Image: Paul Kaluschke, CC BY 3.0, via Wikimedia Commons.