There are multiple definitions:

1. biological response modifier(English)

   • Biology

2. breast meat [yield](English)

   • BRA, MGS
   • Veterinary medicine, Nutrition
   • https://doi.org….1997.tb00510.x

3. B cell resident memory(English)

   • acts as guardian of the alveoli
   • iBALT, NK, PC, ssRNA
   • Immunology, Memory, Pulmonology, Virology
   • https://doi.org…84/jem.20232014