1. pathogen-any disease-producing agent (especially a virus or bacterium or other microorganism). microorganism, micro-organism-any organism of microscopic size.infectious agent, infective agent-an agent capable of producing infection. Translations.. pathogen-any disease-producing agent (especially a virus or bacterium or other microorganism). microorganism, micro-organism-any organism of microscopic size.
Agricultural Tools. The Agricultural Tools ClipArt gallery offers 195 illustrations of hand tools such as plows, pitchforks, insecticide sprayers, rakes, and rollers.
Depending on the season and regional resources, several traditional house types were used. Athabascan Tools and Technology Traditional tools and technology reflect the resources of the regions. Traditional tools were made of stone, antlers, wood, and bone. Such tools were used to build houses, boats, snowshoes, clothing, and cooking utensils.