低てい速そく中ちゅう性せい子していそくちゅうせいしMeanings1nounslow neutronTechnical term in nuclear physics for neutrons with kinetic energy below about 1 eV, often used in contexts like nuclear reactors and neutron scattering.低てい速そく中ちゅう性せい子しは原げん子し炉ろの制せい御ぎょに重じゅう要ような役