an insulating flask that has double walls, usually of silvered glass, with an evacuated space between them. It is used for maintaining substances at high or low temperaturesAlso called: Thermos, Dewar flask
Active vs. Passive Voice: Hear and Be Heard
First, a quick overview, in case all you need is a reminder: In active voice, the subject performs the action of the verb. In passive voice, the subject receives the action of the verb. If you feel like you need a little more than that, keep reading. Passive Voice The subject of a sentence is the person or thing that sentence is about. You can …
The Hardest Words To Spell Just Got A Whole Lot Easier
Read more in this article about some frequently asked questions and fun facts related to our definitions.
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