This leaf has become fossilized.
fossilize definition by Webster's New World
transitive verb fossilized, fossilizing
- to change into a fossil or fossils; petrify
- to make out of date, rigid, or incapable of change
to become fossilized
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- fossilization noun
fossilize definition by American Heritage Dictionary
verb fos·sil·ized, fos·sil·iz·ing, fos·sil·iz·es verb, transitive
- To convert into a fossil.
- To make outmoded or inflexible with time; antiquate.
To become a fossil.
- fosˌsil·i·zaˈtion noun