(physics) a device used for producing a beam of fast neutrons
- Neutron moderator
neutron moderator See moderator.
noun, Physics. 1. the number of neutrons in the nucleus of an atom, equal to the mass number minus the atomic number of the atom. Symbol: N. noun 1. the number of neutrons in the nucleus of an atom N
- Neutron poison
noun 1. (physics) a nonfissionable material used to absorb neutrons and thus to control nuclear reactions
noun 1. an extremely dense, compact star composed primarily of neutrons, especially the collapsed core of a supernova. noun 1. a star that has collapsed under its own gravity to a diameter of about 10 to 15 km. It is composed mostly of neutrons, has a mass of between 1.4 and about 3 times that […]
[noo-truh-pee-nee-uh, nyoo-] /ˌnu trəˈpi ni ə, ˌnyu-/ noun, Medicine/Medical. 1. a decrease in the number of neutrophils in the blood: mild, moderate, or severe neutropenia. /ˌnjuːtrəˈpiːnɪə/ noun 1. an abnormal reduction in the number of neutrophils in the blood, as seen in certain anaemias and leukaemias neutropenia neu·tro·pe·ni·a (nōō’trə-pē’nē-ə, nyōō’-) n. The presence of abnormally […]