There are multiple definitions:

1. bi-cortical osteosynthesis(English)

   • refers to the correction of skeletal Class III malocclusion with bilateral sagittal split osteotomy
   • BSSO, MCO
   • Dentistry, Surgery
   • https://doi.org…jom.2011.10.029

2. bronchite chronique obstructive(French)

   • FLD, OCB
   • Respiratory system, Allergy
   • http://pubmed.n…ih.gov/9036502/