From Davy + -um. <span class="searchmatch">davyum</span> (uncountable) English Wikipedia has an article on: <span class="searchmatch">davyum</span> Wikipedia A supposed chemical element discovered in 1877, later found...
sense): English terms suffixed with -um aluminum antirrhinum concretum <span class="searchmatch">davyum</span> desideratum glucinum lanthanum mithridatum molybdenum œnophorum omnium-gatherum...