Are you a native English speaker? How do you pronounce this word?
A group of extremely light and porous solid materials. The lightest is less than four times as dense as dry air.
Tutoring comment not yet available...
LearnThatWord and the Open Dictionary of English are programs by LearnThat Foundation, a 501(c)3 nonprofit.
Questions? Feedback? We want to hear from you!
or click here for instant support.
Copyright © 2005 and after - LearnThat Foundation. Patents pending.