1. Having a latticelike structure pierced with holes or windows
   - cancellated, clathrate 
2. Having an open or latticed or porous structure
   - cancellated, cancellous

See also: cellular, reticular, reticulate

• Pierre de Fermat
• Pierre de Terrail
• Pierre Joseph Proudhon
• Pierre Laporte Bridge
• Pierre Larousse
• Pierre Simon de Laplace
• Pierre Teilhard de Chardin
• Pierre Terrail
• Pierre Trudeau
• Pierre-Paul Broca
• Pierrot
• Piet Mondrian
• Pieter Breughel
• Pieter Bruegel
• Pieter Brueghel
• Pieter Brueghel the Elder
• Pieter Zeeman
• pietism
• pietist
• pietistic
• pietistical
• piety
• pietà
• piezo effect
• piezoelectric