Meaning of NEPTUNIUM in English

NEPTUNIUM

transcription, транскрипция: [ nep-ˈtü-nē-əm, -ˈtyü- ]

noun

Etymology: New Latin, from International Scientific Vocabulary Neptune

Date: 1941

: a radioactive metallic element that is chemically similar to uranium and is obtained in nuclear reactors especially as a by-product in the production of plutonium — see element table

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.