Dictionary
Find
in
Dictionary
Thesaurus
Translations

Click to move up the list of words
protestation
Proteus
proteus
prothalamion
prothallus
prothesis
prothonotary
prothonotary warbler
prothoracic gland
prothrombin
protist
protium
proto-
Proto-Algonquian
Proto-Germanic
Proto-Indo-European
Proto-Norse
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

protoctist

pro·toc·tist [ prō tóktist ] (plural pro·toc·tists)


noun 
Definition:
 
simple organism with nuclei: a single-celled or relatively simple multicellular organism that possesses nuclei and other membrane-bound cell components. Protozoa, algae, and slime molds are protoctists. Kingdom Protoctista.

[< modern Latin Protoctista, probably alteration of Protista (see protist)]
Advertisement

© 2009 Microsoft