nannofossil(redirected from nannofossils)
Also found in: Medical.
nan·no·fos·silalso nan·o·fos·sil (năn′ə-fŏs′əl)
A very small fossil organism, especially one of the nannoplankton.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.