matrass /matˈrəs/

1. A long-necked chemical flask
2. A hard-glass tube closed at one end

• covalent bonds
• covalently
• covariance
• covariances
• covariant
• covariants
• covaried
• covaries
• covary
• covarying
• cove
• coved
• covelet
• covelets
• covellite
• covellites
• coven
• covenant
• covenantal
• covenanted
• covenantee
• covenantees
• covenanter
• covenanters
• covenanting