1. The act of beginning something new
   - introduction, debut, launching, unveiling, entry

Derived forms: first appearances

Type of: beginning, commencement, start

Encyclopedia: First appearance

• respiratory disorder
• respiratory distress syndrome
• respiratory distress syndrome of the newborn
• respiratory illness
• respiratory infection
• respiratory organ
• respiratory quotient
• respiratory rate
• respiratory syncytial virus
• respiratory system
• respiratory tract
• respiratory tract infection
• respire
• respirometer
• respite
• resplend
• resplendence
• resplendency
• resplendent
• resplendent quetzel
• resplendent trogon
• resplendently
• respond
• respondent
• responder