coccolith definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a minute calcareous plate covering the body of certain golden algae (division Chromophycota)
Origin: ; from Modern Latin coccus (see coccus) plush -lith
coccolith definition by American Heritage Dictionary
A microscopic calcite skeletal plate that protects certain marine phytoplankton and in a fossilized state forms chalk and limestone deposits.
Origin: cocc(us) (from its shape) + -lith.