chemical engineering a bed of fluidized solids used as a heat exchanger or mass transfer medium
gender-fluidRead more in this article about some frequently asked questions and fun facts related to our definitions.
Words And Phrases Your Parents Used That You Can’t Use NowParenting has changed over the years and so has the language. While some phrases were popular years ago, today they are obsolete ... and for good reason. Here are ten old expressions that your parents might have used but you wouldn't dare use today.
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