(anatomy, immunology) The system that differentiates self from non-self and protects the body from foreign substances and pathogenic organisms by producing an immune response. It includes organs such as the thymus, the spleen and lymph nodes; tissue such as bone marrow, and lymphoid tissues such as the tonsils; cells such as lymphocytes including the B cells and T cells, and cell products such as antibodies.

(databases) A suite of interrelated computer programs designed to manage message processing and database update in a tightly controlled manner.

An electronic voice-amplification apparatus, usually containing a set of two loudspeakers and a central control unit, used for singing, giving a speech, play-by-play commentary at events, or broadcasting in public areas like in airports, stations, stations.

(geometry, mathematical analysis) A method of representing the position of any individual point in a space of given dimensionality as a tuple of numerical coordinates.

The practice of working or travelling together with at least one other person, especially when undertaking something potentially risky or hazardous.

(analytic geometry) A system in which the coordinate axes are oblique to each other.

(chemistry) A systematic name for an element, derived from the digits of its atomic number to which the suffix -(i)um is appended; normally only used for transuranic elements before or for a short period after they have been created, after which they will be given a non-systematic name.

A name that systematically designates a well-defined group of entities.

(neuroanatomy) In vertebrates, that part of the nervous system comprising the brain, brainstem and spinal cord.

An electronic system used to store, process and display geographic information, especially maps