There are multiple definitions:

1. fecal occult blood(English)

   • test that helps to diagnose bleeding disorders of the gut
   • FOBT
   • Gastroenterology, Clinical chemistry
   • https://patient…cult-blood-test

2. fiberoptic bronchoscopy(English)

   • role in the diagnosis of endobronchial lesions
   • Pulmonology
   • https://doi.org…thorax.55.5.350

3. foot of bed(English)

   • Nurse / nursing

4. father of baby(English)

   • Neonatal situation