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The adjective "calculous" comes from the Latin calcalosus - "stone", "sedimentary". Calculema (s), fraction of sedimentary rocks, clastic material accumulated at the bottom of reservoirs and layers, consisting of various types of mineral and organogenic inclusions (clays and mineral compounds in the form of crushed stone, gravel, carbonate and fossils). Additionally, this adjective can be used with a negative context to refer to a large amount of dead tissue