a natural accumulation of bitumens at the surface of the earth; often acts as a trap for animals whose bones are thus preserved
a sizeable hole (usually in the ground)
any of various dark heavy viscid substances obtained as a residue
set into opposition or rivalry
(commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on
a workplace consisting of a coal mine plus all the buildings and equipment connected with it
an enclosure in which animals are made to fight
a man who serves as a sailor
the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed
coat with tar
