单词	picogram
释义	picogram noun pi·​co·​gram ˈpē-kō-ˌgram  -kə- : one trillionth of a gram Example Sentences Recent Examples on the Web Even a trace amount of betamethasone — a picogram is a trillionth of one gram — is prohibited on race day in Kentucky, Maryland and New York, which are home to the sport’s Triple Crown races, and considered a violation. chicagotribune.com, 2 June 2021 Even a trace amount of betamethasone — a picogram is a trillionth of one gram — is prohibited on race day in Kentucky, Maryland and New York, which are home to the sport’s Triple Crown races, and considered a violation. The Salt Lake Tribune, 2 June 2021 Even a trace amount of betamethasone — a picogram is a trillionth of one gram — is prohibited on race day in Kentucky, Maryland and New York, which are home to the sport's Triple Crown races, and considered a violation. BostonGlobe.com, 2 June 2021 Words such as picogram and betamethasone are likely unfamiliar to the average horse racing fan, but Dr. Mary Scollay knows them well. Jason Frakes, The Courier-Journal, 11 May 2021 While a picogram is a trillionth of a gram, the test is for picograms per milliliter, and a horse can have 50,000 milliliters of blood. Stephen Whyno, chicagotribune.com, 10 May 2021 Earlier methods for producing the material turned up mere picograms. Courtney Linder, Popular Mechanics, 28 Jan. 2020 Birds, in contrast, have genomes ranging from just under one picogram to just over two. Kate Wong, Scientific American, 1 Nov. 2019 Grooves in the pad directed water from the central and purest part of the core to instruments known as mass spectrometers that continuously measured the quantity of lead down to one hundredth of a picogram, which is one trillionth of a gram. New York Times, 14 May 2018 See More Word History Etymology International Scientific Vocabulary First Known Use 1951, in the meaning defined above Medical Definition picogram noun pi·​co·​gram ˈpē-kō-ˌgram, -kə-  : one trillionth of a gram —abbreviation pg
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