noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   the nucleus of deuterium, consisting of a proton and a neutron
2. 2
   the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators wordnet

Synonyms

All synonyms

dd+hprotont

Etymology

From deutero- + -on. From deuterium, from Ancient Greek δεύτερος (deúteros, “second”).

Related phrases

atomic nucleus

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.