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butter-and-eggs

American  
[buht-er-uhn-egz] / ˈbʌt ər ənˈɛgz /

noun

(used with a singular or plural verb)

plural

butter-and-eggs
  1. any of certain plants whose flowers are of two shades of yellow, as the toadflax, Linaria vulgaris.


butter-and-eggs British  

noun

  1. (functioning as singular) any of various plants, such as toadflax, the flowers of which are of two shades of yellow

"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 butter-and-eggs

First recorded in 1770–80