A specialized chamber or structure within a scorpion's body that houses the stinging tail (telson).
From 'arachnid' + Latin suffix '-ium' (denoting a structure or place). A technical anatomical term used in arachnology and zoology.
The arachnidium's position at the scorpion's rear makes it one of nature's most efficient combat designs—it can strike over the head faster than the human eye can follow!
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