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The Complete Vocabulary Builder Workbook



How to pronounce viscosity (audio)

Dictionary definition of viscosity

The measure of a substance's resistance to flow or deformation.
"The syrup's high viscosity made it difficult to drizzle on the pancakes."

Detailed meaning of viscosity

It describes the internal friction or "thickness" of a liquid or semi-fluid substance. Viscosity determines how easily a substance can flow or be poured, with high viscosity indicating a thick or sticky consistency, while low viscosity suggests a thin and runny nature. This property is influenced by factors such as temperature, pressure, and the molecular structure of the substance. For example, honey has a high viscosity, as it flows slowly and resists pouring, while water has a low viscosity, as it flows easily. Viscosity plays a significant role in various fields, including physics, engineering, and materials science, as it affects the behavior and performance of fluids in different applications such as lubrication, fluid dynamics, and chemical processes.

Example sentences containing viscosity

1. The viscosity of the oil was so high that it required heating before it could be poured.
2. The viscosity of the lava determined how fast or slow it flowed during the volcanic eruption.
3. The chemist measured the viscosity of the liquid using a viscometer.
4. Increasing the temperature of the liquid decreased its viscosity, allowing it to flow more easily.
5. The viscosity of the paint affected the smoothness of the brushstrokes.
6. The viscosity of the melted chocolate created a thick, velvety texture.

History and etymology of viscosity

The noun 'viscosity' has its etymological roots in Latin. It is derived from the Latin word 'viscosus,' which means 'sticky' or 'viscous.' In Latin, 'viscosus' was used to describe substances with a thick, glue-like consistency. Over time, this term was adopted into English as 'viscous,' and 'viscosity' emerged as the noun form. In the scientific context, 'viscosity' refers to the measure of a substance's resistance to flow or deformation, with thicker or more viscous substances resisting flow more than thinner ones. The etymology of 'viscosity' highlights its association with stickiness and thickness, underscoring its use in describing the physical property that determines how fluids flow and deform.

Quiz: Find the meaning of viscosity

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Further usage examples of viscosity

1. The engineer adjusted the viscosity of the lubricant to optimize the performance of the machine.
2. The honey's viscosity made it adhere to the spoon, slowly dripping off in a thick, golden stream.
3. The dentist used a viscous material with high viscosity to fill the cavities.
4. The ink's low viscosity allowed it to flow smoothly from the pen onto the paper.
5. The viscosity of the shampoo determined its ability to coat and cleanse the hair effectively.
6. The scientist studied the effect of pressure on the viscosity of various liquids.
7. The high viscosity of the glue ensured a strong bond between the materials.
8. The viscosity of the blood affects its ability to flow through the circulatory system.
9. The baker adjusted the viscosity of the cake batter to achieve the desired consistency.
10. The paint manufacturer added a viscosity modifier to make the paint easier to spread.
11. The fluid's viscosity influenced its resistance to shear forces and deformation.
12. The viscosity of the sauce contributed to its ability to cling to pasta.
13. The scientist conducted experiments to determine the viscosity index of different oils.
14. The viscosity of honey makes it flow slowly from a spoon.
15. Engineers must consider the viscosity of fluids in pipeline design.
16. The high viscosity of motor oil ensures engine protection.
17. Viscosity plays a vital role in the texture of ice cream.
18. Adjusting temperature affects the viscosity of certain liquids.
19. The viscosity of lava determines its flow during a volcanic eruption.
20. Understanding the viscosity of blood is crucial in medical research.
21. Painters adjust paint viscosity to achieve desired brushstrokes.
22. Measuring the viscosity of ink ensures consistent print quality.
23. The viscosity of molasses makes it challenging to pour.
24. Scientists study the viscosity of magma to predict volcanic activity.



thickness, fluidity, liquidity, runniness


SAT 9 (Scholastic Assessment Test), High School 10, Materials and Substances

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