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Classic usage
Reading level: hard
Estimated CEFR level: B2 — Upper-Intermediate
Estimated from word frequency; not an official CEFR classification.
From Glover's solmization, from Middle English sol (“fifth degree or note of Guido of Arezzo's hexachordal scales”), Italian sol in the solmization of Guido of Arezzo, from the first syllable of Latin solve (“wash away”) in the lyrics of the scale-ascending hymn Ut queant laxis by Paulus Deacon.
colloidal solution, colloidal suspension
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Classic usage
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