[ prō′tək-tĭs′tə ]
A taxonomic kingdom consisting of unicellular protists and their descendant multicellular organisms, considered as a separate taxonomic kingdom in most modern classification systems.
A THANKSGIVING SPELLING QUIZ TO FEED YOUR HISTORY KNOWHOW
Before you celebrate family and blessings this year, take this quiz to test your spelling knowledge of the history and important figures of the first Thanksgiving.
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Words nearby Protoctista
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cultural definitions for Protoctista
[ (pruh-tohk-tis-ta) ]
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.