a·moe·ba also a·me·ba (ə-mēbə)
n. pl. a·moe·bas or a·moe·bae (-bē) also a·me·bas or a·me·bae
Any of various one-celled free-living or parasitic protozoans having no definite form and moving by means of pseudopods.
[New Latin Amoeba, genus name, from Greek amoibē, change, from ameibein, to change; see mei-1 in the Appendix of Indo-European roots.]
a·moebic (-bĭk) adj.
(click for a larger image)amoeba
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.