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
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
7 February 2025
(noun) a piece of fiction that narrates a chain of related events; “he writes stories for the magazines”
The Boston Tea Party helped popularize coffee in America. The hefty tea tax imposed on the colonies in 1773 resulted in America switching from tea to coffee. In the lead up to the Revolutionary War, it became patriotic to sip java instead of tea. The Civil War made the drink more pervasive. Coffee helped energize tired troops, and drinking it became an expression of freedom.
