Hx

HX is an acronym or symbol that can refer to several distinct concepts across different fields, rather than a single, universal entity. Its meaning is highly context-dependent.

In medicine, "Hx" (often written as Hx) is common shorthand for history, especially a patient’s medical history. It appears in clinical notes and electronic health records to indicate past conditions or events, for example “Hx of hypertension.”

In engineering and energy systems, HX stands for heat exchanger, a device that transfers thermal energy between fluids. Heat exchangers are central components in power plants, chemical processing, HVAC systems, and many industrial processes. The term is used in equipment naming and in diagrams to distinguish exchangers from other components.

In electronics and hobbyist hardware, HX appears in product names and model numbers. A well-known example is the HX711, a widely used 24-bit analog-to-digital converter for weigh-scale and sensor applications. Other components or modules may carry HX as a prefix or suffix in their catalog identifiers.

In computing and software contexts, HX may be used as an abbreviation within specific projects, libraries, or hardware codes. There is no universal standard meaning for HX across all areas of computing, so its interpretation depends on the particular project or documentation.

Beyond these uses, HX may occur as a code, brand name, or identifier in various domains, each with its own local definition. See also related terms such as hex, or other context-specific abbreviations.