Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: a genus of diatoms (order Pennales) including several (such as Pseudo-nitzchia australis and P. pungens) that occur in algal blooms, produce domoic acid, and cause amnesic shellfish poisoning
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.
Start your free trial today and get unlimited access to America's largest dictionary, with:
1995, in the meaning defined above
Keep scrolling for more
Resources for Pseudo-nitzchia
Time Traveler for Pseudo-nitzchia
See more words from the same year
Comments on Pseudo-nitzchia
What made you want to look up Pseudo-nitzchia? Please tell us where you read or heard it (including the quote, if possible).
an open space surrounded by woods
Get Word of the Day daily email!
Name that Food Quiz
Can you spell these 10 commonly misspelled words?
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Impress your friends, annoy your relatives.
Words from the week of 9/14/2018
For frog-tossing, sword dancing, & more
That dessert might kill you
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Test your knowledge of food and food words.
A quiz in common time.
Build a city of skyscrapers—one synonym at a time.