(immunology) An aspect of the innate immune system that supplements the actions of the antibodies and phagocytic cells in clearing out pathogens from an organism

(historical) A penal method of the 19th century in which prisoners worked during the day in groups and were kept in solitary confinement at night, with enforced silence at all times.

Alternative form of systemwide

(set theory, measure theory, probability theory) A non-empty collection of subsets of a given set Ώ that is closed under non-empty finite intersections.

(medicine) A system for reporting cervical or vaginal cytologic diagnoses, specifically Pap smear results. / (medicine) A similar system for cytopathology of thyroid nodules.

The interaction of the Earth's atmosphere, hydrosphere, cryosphere, lithosphere, and biosphere, responsible for the climate.

(algebra) A set of algebraic structures (which are part of a concrete category; e.g., modules) and a set of morphisms between them (e.g., module homomorphisms) which all together form a small category which is the image of a covariant functor whose domain is a directed poset.

(mathematics) In combinatorial mathematics, a type of block design, specifically a t-design with λ = 1 and t = 2 or (recently) t ≥ 2.

(pleonastic) Synonym of GPS.

An integrated circuit (also known as a chip) that integrates all or most components of a computer or other electronic system.