1. Gradually decreasing in tempo
   - rallentando, ritardando, rit.

See also: decreasing

• propyl group
• propyl radical
• propylaeum
• propylene
• propylene glycol
• propylon
• propylthiouracil
• prorate
• proration
• prorogation
• prorogue
• pros and cons
• prosaic
• prosaically
• prosaicness
• prosaism
• prosaist
• Prosauropoda
• proscenium
• proscenium arch
• proscenium wall
• prosciutto
• proscribe
• proscribed
• proscription