n.
Pronunciation: ' r ē -n ē - ə m
Function: noun
Etymology: New Latin, from Latin Rhenus Rhine River
Date: 1925
: a rare heavy metallic element that is obtained either as a gray powder or as a silver-white hard metal, is usually extracted as a by-product of molybdenum smelting, and is used especially in catalysts and alloys ― see ELEMENT table