1. Belonging to some prior time
   - erstwhile, former, old, one-time, quondam, sometime

1. On one occasion
   - once, in one case

See also: past

• pyridoxal
• pyridoxamine
• pyridoxine
• pyriform
• pyriform area
• pyriform lobe
• pyrilamine
• pyrimidine
• pyrite
• pyrites
• pyro-
• pyrocellulose
• Pyrocephalus
• Pyrocephalus rubinus mexicanus
• pyrochemical
• pyrochemical process
• pyrochemistry
• pyroclastic
• pyroelectric
• pyroelectrical
• pyroelectricity
• pyrogallic
• pyrogallic acid
• pyrogallol
• pyrogen