Definition of Protophyta
: a major category of lower plants: such as a in former classifications : a division or other group comprising the algae, fungi, and lichens b in some especially former classifications : a division or other group comprising unicellular plants and including bacteria, yeasts, slime molds, blue-green algae, and various simple green algae —often used as a term of convenience rather than strict taxonomy — compare protista c in some classifications : a division comprising unicellular and noncellular organisms and including blue-green algae, bacteria, rickettsias and related organisms, and viruses —used chiefly in bacteriological taxonomy
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of protophyta
New Latin, from prot- + -phyta
Seen and Heard
What made you want to look up Protophyta? Please tell us where you read or heard it (including the quote, if possible).