• Thermogenic type of adipose tissue containing a dark pigment, and arising during embryonic life in certain specific areas in many mammals, including man; prominent in the newborn of all species in which it occurs and remains a distinct and conspicuous tissue in the adults of certain species, especially those that hibernate.
  CRISP Thesaurus
  National Institutes of Health, 2006
• (brown adipose tissue) Adipose tissue, cells of which contain multiple small lipid droplets.
  Foundational Model of Anatomy
  University of Washington, 2017
• (brown adipose tissue) Brown-colored adipose tissue that is present in higher concentrations in newborns and hibernating animals. It contains numerous small droplets of lipids and high numbers of mitochondria as its primary function is to generate body heat.
  NCI
  U.S. National Cancer Institute, 2021
• (adipose tissue, brown) A thermogenic form of adipose tissue composed of BROWN ADIPOCYTES. It is found in newborns of many species including humans, and in hibernating mammals. Brown fat is richly vascularized, innervated, and densely packed with MITOCHONDRIA which can generate heat directly from the stored lipids.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Brown adipose tissue, specialized type of connective tissue found in most mammals that generates heat. Newborns and animals that hibernate have an elevated risk for hypothermia. Newborns, for example, have a larger surface area-to-volume ratio than adults and cannot warm themselves on their own by...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025