“Coffee, the favorite drink of the civilized world.” – Thomas Jefferson, third president of the United States
RUBIDIUM
rubidium, Rb, atomic number
(noun) a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
Source: WordNet® 3.1
Etymology
Noun
rubidium (usually uncountable, plural rubidiums)
The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
(countable) A single atom of this element.
Source: Wiktionary
Ru*bid"i*um, n. Etym: [NL., fr. L. rubidus red, fr. rubere to be red. So called from two dark red spectroscopic lines by means of which it was discovered in the lepidolite from Rozena, Moravia. See Rubicund.] (Chem.)
Definition: A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Symbol Rb. Atomic weight, 85.2.
Source: Webster’s Unabridged Dictionary 1913 Edition
Recent Word Finds
Word of the Day
30 April 2025
SCOMBROID
(noun) important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters
Coffee Trivia
