moya

1. (obsolete, geology) Flowing mud associated with a volcanic eruption (especially in South America), formed when snow or a lake near a volcano is disrupted, or when rain or steam mixes with soil or ash during an eruption.Examples: "These are the principal tufas indicative of the boiling tufaceous mud, or moya, which once filled, even to an overflow, the valley of Rieden."Synonyms: mud lava, volcanic mud, tufaceous mudcountableobsoleteuncountable