yttrium, atomic number
(noun) a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
Source: WordNet® 3.1
yttrium (usually uncountable, plural yttriums)
A silvery metallic chemical element (symbol Y) with an atomic number of 39, mainly found in combination with lanthanide elements in rare-earth minerals.
Source: Wiktionary
Yt"tri*um, n. Etym: [NL., from Ytterby, in Sweden. See Erbium.] (Chem.)
Definition: A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89. [Written also ittrium.]
Note: Associated with yttrium are certain rare elements, as erbium, ytterbium, samarium, etc., which are separated in a pure state with great difficulty. They are studied by means of their spark or phosphorescent spectra. Yttrium is now regarded as probably not a simple element, but as a mixture of several substances.
Source: Webster’s Unabridged Dictionary 1913 Edition
2 November 2024
(noun) a dull unattractive unpleasant girl or woman; “she got a reputation as a frump”; “she’s a real dog”
International Coffee Day (September 29) is an occasion to promote and celebrate coffee as a beverage, with events occurring in places across the world. A day to promote fair trade coffee and raise awareness for the coffee growers’ plight. Other countries celebrate this event on October 1.
