In 1884, Angelo Moriondo of Turin, Italy, demonstrated the first working example of an espresso machine.
DROSS
impurity, dross
(noun) worthless or dangerous material that should be removed; “there were impurities in the water”
slag, scoria, dross
(noun) the scum formed by oxidation at the surface of molten metals
Source: WordNet® 3.1
Etymology
Noun
dross (usually uncountable, plural drosses)
Waste or impure matter.
Residue that forms on the surface of a metal from oxidation.
The impurities in metal.
A waste product from working with metal.
(figurative) Worthless or trivial matter.
Synonyms: junk, rubbish
Verb
dross (third-person singular simple present drosses, present participle drossing, simple past and past participle drossed)
(transitive) To remove dross from.
Anagrams
• sords
Source: Wiktionary
Dross, n. Etym: [AS. dros, fr. dreósan to fall. See Dreary.]
1. The scum or refuse matter which is thrown off, or falls from, metals in smelting the ore, or in the process of melting; recrement.
2. Rust of metals. [R.] Addison.
3. Waste matter; any worthless matter separated from the better part; leavings; dregs; refuse. All world's glory is but dross unclean. Spenser. At the devil's booth are all things sold, Each ounce of dross coats its ounce of gold. Lowell.
Source: Webster’s Unabridged Dictionary 1913 Edition
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