- any of several black, semisolid bitumens between petroleum and asphalt in consistency
- any of several natural, viscous hydrocarbon mixtures, as ozocerite
Origin of malthaClassical Latin ; from Gr, mixture of wax and pitch ; from Indo-European an unverified form meldh-, become soft ; from base an unverified form mel-, to grind from source mill
A black, viscous natural bitumen.
Origin of malthaMiddle English malthe, from Latin maltha, from Greek, a mixture of wax and pitch; see mel-1 in Indo-European roots.