Learn how to say Fluids correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word fluid:
a substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid:
a bottle of cleaning fluid
1(of a substance) able to flow easily:
the paint is more fluid than tube watercolours
smoothly elegant or graceful:
her movements were fluid and beautiful to watch
not settled or stable; likely or able to change:
our plans are still fluid
the fluid political situation of the 1930s
2(of a clutch or coupling) using a liquid to transmit power.
late Middle English (as an adjective): from French fluide or Latin fluidus, from fluere ‘to flow’