Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun bk
1 sense of bk
Sense 1
berkelium, Bk, atomic number 97 -- (a radioactive transuranic element; discovered by bombarding americium with helium)
=> metallic element, metal -- (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)