'Protoctista' definitions:
Definition of 'Protoctista'
From: WordNet
noun
In most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals [syn: Protoctista, kingdom Protoctista]