1. The internal counterintelligence agency of the Russian Federation and successor to the Soviet KGB; formerly led by Vladimir Putin
   - FSB, Federal Security Service

Type of: Russian agency

• oligo-
• Oligocene
• Oligocene epoch
• Oligochaeta
• oligochaete
• oligochaete worm
• oligoclase
• oligodactyly
• oligodendria
• oligodendrocyte
• oligodendroglia
• oligodontia
• oligomenorrhea
• oligonucleotide
• Oligoplites
• oligopoly
• Oligoporus
• Oligoporus leucospongia
• oligopsony
• oligosaccharide
• oligospermia
• oligotrophic
• oliguria
• Olimbos
• olio