deuterium
- n an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
deuterium oxide
- n water containing a substantial proportion of deuterium atoms, used in nuclear reactors
deuteromycetes
- n form class; coextensive with subdivision Deuteromycota
deuteromycota
- n large and heterogeneous form division of fungi comprising forms for which no sexually reproductive stage is known