meerschaum /mērˈshəm or -showm/

1. A fine light whitish clay, sepiolite, once supposed to be a petrified sea-scum
2. A tobacco pipe made of it

• scuba diver
• scuba divers
• scuba diving
• scubas
• scuchin
• staddle stone
• staddle stones
• stade
• stades
• stadholder
• stadholders
• stadia
• stadia hairs
• stadial
• stadia lines
• stadials
• stadia rod
• stadias
• stadium
• stadium rock
• stadium rocks
• stadiums
• stadtholder
• stadtholders
• staff