1. (physics) an optical device containing parallel mirrors, used e.g. to measure wavelength
   - Fabry-Pérot interferometer

Derived forms: etalons

Encyclopedia: Etalon

• piperocaine hydrochloride
• pipestem clematis
• pipestone
• pipet
• pipette
• pipework
• pipewort
• pipewort family
• Pipidae
• Pipile
• Pipilo
• Pipilo erythrophthalmus
• piping
• piping crow
• piping crow-shrike
• piping guan
• piping plover
• pipistrel
• pipistrelle
• Pipistrellus
• Pipistrellus pipistrellus
• Pipistrellus subflavus
• pipit
• pipkin
• Turkish Delight