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

Derived forms: etalons

Encyclopedia: Etalon

• premise
• premises
• premiss
• premium
• Premium Bond
• premix
• premolar
• premonition
• premonitory
• Prenanthes
• Prenanthes alba
• Prenanthes purpurea
• Prenanthes serpentaria
• prenatal
• prenatal diagnosis
• prenominal
• prenotion
• prentice
• prenuptial
• prenuptial agreement
• preoccupancy
• preoccupation
• preoccupied
• preoccupy
• preoperative