Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
protoactinium | Yes | No | No | No |
metallic element | Yes | No | No | No |
protoactinium (noun) | metallic element (noun) |
---|---|
a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead | any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |