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Saybolt universal seconds

British  
/ ˈseɪˌbəʊlt /

noun

  1. (functioning as singular) a US measurement of viscosity similar in type to the British Redwood seconds

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Saybolt universal seconds

named after G. M. Saybolt (died 1924), US chemist, who proposed it