In 1884, Angelo Moriondo of Turin, Italy, demonstrated the first working example of an espresso machine.
HYDRACID
Etymology
Noun
hydracid (plural hydracids)
(chemistry) An acid that does not contain any oxygen as opposed to an oxyacid; they are all binary compounds of hydrogen and a halogen or pseudohalogen.
Source: Wiktionary
Hy*drac"id, n. Etym: [Hydr- + acid: cf. F. hydracide.] (Chem.)
Definition: An acid containing hydrogen; -- sometimes applied to distinguish acids like hydrochloric, hydrofluoric, and the like, which contain no oxygen, from the oxygen acids or oxacids. See Acid.
Source: Webster’s Unabridged Dictionary 1913 Edition
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27 May 2025
DIRECTIONALITY
(noun) the property of being directional or maintaining a direction; “the directionality of written English is from left to right”
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