1. (mathematics and logic) if and only if

Encyclopedia: Iff

• snow-in-summer
• snow-on-the-mountain
• snow-white
• snowball
• snowbank
• snowbell
• snowberry
• snowbird
• snowblindness
• snowboard
• snowboarder
• snowboarding
• snowbound
• snowcap
• snowdrift
• snowdrop
• snowdrop anemone
• snowdrop tree
• snowdrop windflower
• snowfall
• snowfield
• snowflake
• snowman
• snowmobile
• snowplough