To enjoy the CBBC Newsround website at its best you will need to have JavaScript turned on. Michael Bryan, 16, used the 45-letter long word pneumonoultramicroscopicsilicovolcanoconiosis at a Youth Select Committee (Pictures from parliamentlive.tv)

Do you know what pneumonoultramicroscopicsilicovolcanoconiosis means? Well, this guy does!

Michael Bryan, 16, used the word at a Youth Select Committee meeting in July, when talking about money spent on mental health.

According to the Oxford English Dictionary, pneumonoultramicroscopicsilicovolcanoconiosis is "an invented long word said to mean a lung disease caused by inhaling very fine ash and sand dust".

Want to use a fancy word like this to impress your friends and family? Newsround has got you covered...

Getty Images Being sesquipedalian can be rather helpful if you are doing a crossword

Word: Sesquipedalian

Means: Loving of long words

Pronounced: Sess-kwi-peh-day-leean

Sentence to use it in: As someone who is quite sesquipedalian, I make it my mission to use loads of long words in all my conversations.

Getty Images STOP with the long words, keep it short

Word: Hippopotomonstrosesquipedaliophobic

Means: Someone with a fear of long words

Pronounced: Hippoh-poh-toh-mon-stroh-sess-kwi-ped-ah-lee-oh-foe-bik

Sentence to use it in: Any hippopotomonstrosesquipedaliophobics are going to really hate me with my new vocabulary.

Getty Images One ticket to...er... here please

Word: Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

Means: It is the name of a Welsh village and is the longest place name in the UK!

Pronounced: Llan-vire-pooll-gwin-gill-goh-gare-uh-win-drorb-ooll-llanty-sillyoh-gohgohgoh

Sentence to use it in: Fancy a trip to Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch this summer?

Getty Images This new five pound means the Bank of England have decided the old fivers are worthless

Word: Floccinaucinihilipilification

Means: The act of deciding that something is worthless. This is one of the longest words in the English language, so any sesquipedalian would be wise to know this one.

Pronounced: flok-sih-naw-kinih-hillih-pillih-fik-ay-shun

Sentence to use it in: I am very offended by my friend's floccinaucinihilipilification of my amazing new vocabulary.

Getty Images Liverpool manager Jurgen Klopp is known for responding to some questions about his team with good humour

Word: Facetiously

Means: If you do something facetiously, you are deliberately treating something that is perhaps quite serious with inappropriate jokes or humour. It's a great word because it has every single vowel - and the semi-vowel 'y' - just once!

Pronounced: fah-see-shush-lee

Sentence to use it in: You should never behave facetiously when it comes to important and serious matters such as the use of fancy words.

Word: Antidisestablishmentarianism

Means: This originally meant when people were against the removal of the Church of England's status, but now it can be used to refer to a movement against the government taking away their support for a particular church or religion.

Pronounced: anti-dis-est-ab-lish-men-tare-rian-ism

Sentence to use it in: Did you know that antidisestablishmentarianism was left out of the 10th edition of the Concise Oxford Dictionary by mistake? No, but you do now.

Getty Images This 100 carat diamond looks perfect to us

Word: Quintessential

Means: The perfect example of something

Pronounced: Kwin-teh-sen-shul

Sentence to use it in: I am a quintessential sesquipedalian.

Word: Boondoggle

Means: Work that you do just so that you look busy, but it isn't actually useful.

Pronounced: As it looks - this one's not too tricky to pronounce!

Sentence to use it in: You might think my mission to learn more long words is a complete boondoggle, but it's actually extremely interesting.

Getty Images Why use lots of words when you could use just one?

Word: Circumlocution

Means: The use of lots of words where fewer words would actually do the job.

Pronounced: Sir-cum-loh-cue-shun

Sentence to use it in: My love of circumlocution means you may think my sentences are unnecessarily long - but I would disagree.

Getty Images Are these big boats a little boastful?

Word: Gasconade

Means: To extravagantly boast

Pronounced: Gas-con-ayde

Sentence to use it in: I don't like to gasconade, but my vocabulary after reading this article is quite exceptional.

Getty Images A Brobdingnagian footballer (we're not talking about Michael Owen)

Word: Brobdingnagian

Means: Huge or gigantic. It has a capital letter as the word comes from the name of a land in Gulliver's Travels where everything is enormous.

Pronounced: Brob-ding-nag-ian

Sentence to use it in: I have a vocabulary of Brobdingnagian proportions!

Getty Images A wall. Literally just a picture of a wall.

Word: Lateritious

Means: All this word means is brick-red in colour... But it's a much funnier way of saying it!

Pronounced: Lat-er-rih-shush

Sentence to use it in: I am a huge fan of your lateritious T-shirt.

Getty Images Warren Beatty looked a little discombobulated by the bizarre ending to this year's Oscar ceremony

Word: Discombobulate

Means: To confuse (someone)

Pronounced: Dis-com-bob-bew-late

Sentence to use it in: Do you want to learn some more long words too or are you too discombobulated after reading this article?