⊿ Point. {R} Glossary. ◢ Keyword: U. ◥ University. {q} PhD. {tr} Training. ⚫ UK. ↂ EndNote. ✊ Harvey (2009) Unit. From Wikipedia, the free encyclopedia Unit may refer to: General measurement[edit] Unit of measurement, a definite magnitude of a physical quantity, defined and adopted by convention or by law International System of Units (SI), modern form of the metric systemEnglish units, historical units of measurement used in England up to 1824Unit of lengthHumorous units of measurement Some less serious or controversial units Science and technology[edit] Physical sciences[edit] Natural unit, a physical unit of measurementGeological unit or rock unit, a volume of identifiable rock or iceAstronomical unit, a unit of length roughly between the Earth and the Sun Chemistry and medicine[edit] Mathematics[edit] Computing[edit] Business[edit] Military[edit] Active service unit, the former Provisional Irish Republican Army cellMilitary unit, an homogeneous military organization whose administrative and command functions are self-containedSayeret Matkal (The Unit), the Israeli special forces unit Music[edit]