viscous Definition

having a thick, sticky consistency between solid and liquid; having a high viscosity.

Using viscous: Examples

Take a moment to familiarize yourself with how "viscous" can be used in various situations through the following examples!

  • Example

    The oil was so viscous that it barely flowed.

  • Example

    The syrup is too viscous to pour easily.

  • Example

    The mud was thick and viscous after the rain.

  • Example

    The lava was highly viscous and moved very slowly.

viscous Synonyms and Antonyms

Synonyms for viscous

Antonyms for viscous

Phrases with viscous

  • a fluid with a high resistance to flow due to its thickness and stickiness


    The honey is a viscous fluid that flows slowly.

  • the force exerted on an object moving through a viscous fluid, such as air or water, that opposes the motion of the object


    The airplane experienced significant viscous drag as it flew through the thick clouds.

  • a mechanical device that uses a viscous fluid to transmit torque between two rotating shafts


    The car's all-wheel-drive system uses a viscous coupling to distribute power between the front and rear wheels.

Origins of viscous

from Latin 'viscosus', meaning 'sticky'


Summary: viscous in Brief

'Viscous' [ˈvɪskəs] describes substances that have a thick, sticky consistency between solid and liquid. It is often used in scientific contexts to describe fluids with high resistance to flow, such as 'viscous fluid' or 'viscous drag.' 'Viscous' can be formal, with synonyms like 'thick' and 'sticky,' or informal, with words like 'gooey' and 'sludgy.'

How do native speakers use this expression?