jūsuinara
1. If heavy water; When heavy water
Noun
#139787
1. If heavy water; When heavy water
1. deuterium; heavy hydrogen
1. heavy water
1. heavy-water reactor
1. It's not heavy water.; It isn't deuterium.
1. It was heavy hydrogen.
1. Probably deuterium.; It's likely deuterium.
1. It was not heavy water.; It wasn't deuterium.
1. if it were heavy water; if it is heavy water
1. Heavy water.; It is heavy water.