spuriosity

1. (rare) Spuriousness.Examples: "Ye are next to aſſure all Perſons, vvho are ſo kind as to give you Audience, that to prevent the leaſt Suſpicion of Spurioſity, they may ſee every Letter I have ever printed of Mr. Pope’s in his Ovvn Hand-VVriting, […]"; "So she made Sir John write to the "Times" to command the Chancellor of the Exchequer for the time being to put a tax on long words:— […] A heavy tax on words over four syllables, as heterodoxy, spontaneity, spiritualism, spuriosity, &c."; "This is the sort of struggle which proves a man's metal, and declares it sterling or counterfeit. No spuriosity, no charlatanry can stand this fiery alembic of hard-wrought and exquisite calculation, in which one mathematic point or unit misplaced destroys the whole chain of reasoning, and proves the candidate a blunderer."Synonyms: falsity, inauthenticityAntonyms: authenticity, genuineness, truthfulness, veracitycountablerareuncountable

2. (rare) That which is spurious; something false or illegitimate.Examples: "Haydn spuriosities were generated by demand for [Joseph] Haydn's works and by manuscript circulation. In genres like keyboard sonatas, piano trios and songs, where manuscript circulation was light, there were relatively few spuriosities."; "In their study of American extremist groups, John George and Laird Wilcox note that although distorting or actually fabricating quotations is commonly employed by extremists, "American leftists have used spuriosities of that sort sparingly, [while] groups and individuals on the far right have raised such utilizations to a high art form.""countablerareuncountable