1. The government agency in the United Kingdom that is responsible for internal security and counterintelligence overseas
   - MI 6 [Brit], Military Intelligence Section 6 [Brit]

Derived forms: Secret Intelligence Services

Type of: international intelligence agency

Encyclopedia: Secret Intelligence Service

• leucocytosis
• leucocytozoan
• leucocytozoon
• Leucogenes
• Leucogenes leontopodium
• leucoma
• leucopenia
• leucorrhea
• leucorrhoea
• leucothoe
• Leucothoe editorum
• Leucothoe fontanesiana
• Leucothoe racemosa
• leucotomy
• Leuctra
• leukaemia
• leukemia
• Leukeran
• leuko-
• leukocyte
• leukocytosis
• leukoderma
• leukoencephalitis
• leukoma
• leukopenia