1. Retrovirus causing T-cell leukaemia
   - HTLV-1

Type of: retrovirus

• expendable
• expender
• expending
• expenditure
• expense
• expense account
• expense record
• expensive
• expensively
• expensiveness
• experience
• experienced
• experient
• experiential
• experiment
• experimental
• experimental condition
• experimental extinction
• experimental method
• experimental procedure
• experimental psychology
• experimental variable
• experimentalism
• experimentally
• experimentation