standard dollar

noun

the basic monetary unit of the U.S., since January 31, 1934, containing 15⁵/₂₁ grains of gold, 0.900 fine: previously contained 25.8 grains of gold, 0.900 fine.

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Origin:
1875–80, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Standard dollar is always a great word to know.

So is doohickey. Does it mean:

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

a gadget; dingus; thingumbob.

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