Thick and sticky in consistency, flowing slowly like honey or thick syrup.
From Latin 'viscum' (birdlime, a sticky substance), related to 'viscera' (internal organs). The Latin root carries the sense of stickiness and thickness.
In physics and cooking, viscosity is measured scientifically—olive oil and honey have very different viscosities, which is why honey coats your throat while oil slides right down, and understanding viscosity is crucial for everything from engine oil to blood flow in veins.
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