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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From slime + ball. Sense 1 (“a round lump made up of or coated with slime or a slime-like substance”) is a calque of German Schleimkugel, from Schleim (“mucus, slime”) + Kugel (“ball”), while sense 1.1 (“a mucus-coated lump containing the cercariae of a liver fluke”) may be a calque of German Schleimball (from Schleim (“slime”) + Ball (“ball”)).
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Classic usage
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