Definition of ferrofluid in English:

ferrofluid

Syllabification: fer·ro·flu·id
Pronunciation: /ˈferōˌflo͞oid
 
/

noun

[often as modifier]
  • A fluid containing a magnetic suspension: ferrofluid cooling
    More example sentences
    • While ‘Lost’ and ‘Icelandic Rift’ contain the not-to-be missed natural wonder of magnetic ferrofluid.
    • Airlines use ferrofluids to help seal rotary valves.
    • We live in a world of atomic clocks, of ten dollar lasers you can hold in your hand, of supersonic passenger planes, space stations and ‘ferrofluid.’

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a slit made by cutting with a saw