(physics) A subatomic particle forming part of the nucleus of an atom and having no charge; it is a combination of an up quark and two down quarks.

plural of neutron

(physics, astronomy) The process, such as within a collapsing star, in which protons and electrons fuse to form neutrons and release neutrinos.

(physics) Relating to neutrons or to neutronics

(physics) The flow of a stream of neutrons

(astronomy) A degenerate star that has been so collapsed by gravity that its electrons and protons have been merged into neutrons by the intense pressure. The solid mass of neutrons is sometimes called neutronium.

An atomic bomb that produces a greater amount of neutrons, and a lesser amount of blast; the intention being to create equal lethal neutron radiation and blast radii which increases the effectiveness of the weapon against armour while reducing collateral damage.

(physics) any of several techniques that use the wavelike behaviour of neutrons as a scientific probe

(physics) The interference process which occurs when neutrons are scattered by the atoms within solids, liquids and gases.

(physics) The field of study in which neutrons are used as a probe for measuring the excited states of nuclides.