Think you've got what it takes to spell words such as plutonomy, virucide or Listzian? How about Ouagadougou, epideictic or aurochs?  

Better yet, can you also come up with their definitions?

The Scripps National Spelling Bee is underway and kids from all around the country are battling it out to determine who is America's top speller. This year, the bee comes with an added twist: participants are tested on vocabulary as well as spelling. What's even more interesting is that the kids who have been preparing all year (or for many years) to compete at the national bee just found out about the vocabulary curve ball in April. Not a lot of time to learn the definitions of the thousands of words they have memorized for spelling.

But in this video from the Associated Press, Paige Kimble, executive director of the Scripps National Spelling Bee, explains that the aim of the new challenge is to "recommit the bee to its purpose, which is to help students improve their spelling, increase their vocabularies, [and] learn concepts.  

Another new feature this year is that bee organizers have added a take-home test so that spelling mortals — like me — can try all of this spelling and defining at home.  

In the interests of science, I took the test. Bottom line: My spelling is not so hot, but I aced the definitions. (Whew! I'm not a total lost cause!)

Want to try the test? Head over to the Scripps National Spelling Bee sample test site.

Good luck to the kids who are heading into the championship finals tonight. You can cheer them on from home — and spell along with them — from 8-10 p.m. EST tonight over at ESPN.

Can you spell these words? Oh, and we need a definition, too.
The Scripps National Spelling Bee enters its final round tonight, with kids around the country competing for the title of top speller.