firn /firn or fûrn/

Snow on high glaciers while still granular

• mass producer
• mass producers
• mass-produces
• mass-producing
• mass production
• mass radiography
• mass spectrograph
• mass spectrographs
• mass spectrometer
• mass spectrometers
• mass spectrometry
• mass transit
• mass-transit
• massy
• massymore
• massymores
• massé
• massés
• mast
• MASTA
• mastaba
• mastabas
• mast cell
• mast cells
• mastectomies