unnilpentium

[ yoo-nil-pen-tee-uhm ]

noun

, Chemistry, Physics.

1. the systematic element name for element 105 before being named dubnium. : Unp

Word History and Origins

Origin of unnilpentium¹

First recorded in 1980–85; from Latin ūn(us) “one” + nil ( def ) “zero” + Greek pént(e) “five” + -ium ( def )