Maltha

[mælθә]

(noun.) a thick black tar intermediate between petroleum and asphalt.

Edited by Caleb--From WordNet

(n.) A variety of bitumen, viscid and tenacious, like pitch, unctuous to the touch, and exhaling a bituminous odor.

(n.) Mortar.

Inputed by George

n. a thick mineral pitch: any similar preparation used by the ancients as a cement stucco or mortar.

Typed by Elvin