The term "core sample" refers to a cylindrical sample taken from the earth's crust or a large structure. There are several synonyms for this term, such as borehole sample, drill core, geologic sample, or rock core. These synonyms are often used interchangeably depending on the context and field of study. A core sample is commonly used in geological exploration, mining, and construction industries to gather information about the composition, structure, and properties of the subsurface material. The sample is analyzed by a variety of techniques, including physical, chemical, and geological methods, to obtain insights regarding its age, history, and potential use.