Definition of brown fat in English:

brown fat


mass noun
  • A dark-coloured adipose tissue with many blood vessels, involved in the rapid production of heat in hibernating animals and human babies.

    • ‘Unlike normal white fat that stores surplus energy, brown fat generates heat in response to cold or excess caloric intake.’
    • ‘They may be composed purely of mature adipocytes, or of brown fat, or of adipocytes in combination with mature smooth muscle and vascular elements (angiomyolipoma).’
    • ‘Scientists have measured higher rates of bodily heat production only in the flight muscles of some insects and, possibly, the brown fat of hamsters.’