Noun : a diagram of an engine.    From Dictionary.com. 

The amusement might come in diagramming the sentence (assuming that the French do that).    From Wordnik.com.  [tl; dr | Diane Duane's weblog: "Out of Ambit"] Reference

I have a suspicion that sentence diagramming is something you learn in American school, and not many other places.    From Wordnik.com.  [Predicated on whatever.] Reference

Sentence diagramming is a fun party trick.    From Wordnik.com.  [February « 2008 « Morgan Dempsey] Reference

Ah, sentence diagramming is indeed great!.    From Wordnik.com.  [Pick your main verb carefully.] Reference

It's also like being the coach- diagramming the plays.    From Wordnik.com.  [Good Intentions..yes, they do pave the road to Hell.] Reference

I enjoyed diagramming sentences at the age of 12 or 13!.    From Wordnik.com.  [Predicated on whatever.] Reference

Finally a diagramming (parsing) sentences is put to good use.    From Wordnik.com.  [Stalkers only hear the horizontal lines.] Reference

I won't insult the other commenters by diagramming sentences.    From Wordnik.com.  [The Forked Tongue Speaks, Arnold Kling | EconLog | Library of Economics and Liberty] Reference

The sentence diagramming tended to confuse me rather than help.    From Wordnik.com.  [Exercise Book for Understanding English Grammar « Books « Literacy News] Reference

She thinks diagramming sentences is a fun alternative to Sudoku.    From Wordnik.com.  [Comic-Con Panels: Chuck and Heroes - Pink Raygun.com] Reference

OmniGraffle is a object oriented drawing or diagramming program.    From Wordnik.com.  [Omnigraffle – Network Diagramming — Meandering Passage] Reference

Mike Sutton went from diagramming plays to relearning the basics.    From Wordnik.com.  [CNN Transcript Jan 16, 2007] Reference

And not have to spend all day diagramming sentences for Microsoft.    From Wordnik.com.  [For some mysterious reason, I am angry all the time lately] Reference

Try diagramming that sentence to figure out what it is I was saying.    From Wordnik.com.  [Codling Moths and frogs] Reference

Gotta get all matrix-like and start diagramming the fall schedule because.    From Wordnik.com.  [Is it sad that I can't wait for new fall TV?] Reference

I'm ready for my first lesson, especially if you teach sentence diagramming.    From Wordnik.com.  [Hillary To NBC: Fire David Shuster] Reference

It looks like he is diagramming the finale tonight of Dancing With the Stars.    From Wordnik.com.  [Dallas Blog, Daily News, Dallas Politics, Opinion, and Commentary FrontBurner Blog D Magazine » Blog Archive » Eric Celeste: Master of the White Board] Reference

BTW, here are some examples of sentence diagramming that I think you will appreciate.    From Wordnik.com.  [A Price on Integrity, David Henderson | EconLog | Library of Economics and Liberty] Reference

The partially exploded perspective also includes diagramming of the fabrics function.    From Wordnik.com.  [Build Blog » Re-thinking Construction Documents] Reference

Or else this vague paperwork stuff, diagramming hexes, the structural analysis of spells.    From Wordnik.com.  [I love this cover | Diane Duane's weblog: "Out of Ambit"] Reference

Maybe I was too busy diagramming my sentences that I wasn't able to get it out clearly.    From Wordnik.com.  [CNN Transcript Feb 17, 2002] Reference

I dunno, I think diagramming was a good thing — I think it taught me how language works.    From Wordnik.com.  [Do you think they have one of these for bloggers? « Dating Jesus] Reference

(Later he would get downright professorial, diagramming political dynamics on a chalkboard.).    From Wordnik.com.  [Mort the Knife] Reference

With nothing immediately happening, Bobby returned to diagramming the building for his team.    From Wordnik.com.  [Alone]

(She also mentioned an early love of diagramming sentences; I adored diagramming sentences.).    From Wordnik.com.  [Fear and Fiction, Part II] Reference

Your article made me conjure up vague recollections of chalkboards and diagramming sentences.    From Wordnik.com.  [A gripe with grammar « Write Anything] Reference

They reminded me of pumped-up ex-football players doing pre-game analysis and diagramming plays.    From Wordnik.com.  [Jeff Cohen: Military Propaganda Pushed Me Off TV] Reference

Is it a sign of welcome coverage when newspapers begin diagramming the staff charts of candidates?.    From Wordnik.com.  [OpEdNews - Quicklink: With Trippi\'s Rise, Some See a New John Edwards] Reference

(Hm. I wonder if we'll ever get a chart diagramming something with 'reliance on WikiPedia.') 5: 47 AM.    From Wordnik.com.  [Relatively.] Reference

Next thing you know, though, we will all be diagramming sentences on the VC because it is so much fun.    From Wordnik.com.  [The Volokh Conspiracy » It’s Not the Crime, It’s the Cover-Up — Sestak Edition] Reference

Oh, there I go and misspell diagramming one too many glasses of Sauvignon Blanc this evening, dare I say.    From Wordnik.com.  [Coyote Blog » Blog Archive » Health Care Opposition Not About Being Uncharitable] Reference

I plan to do a fair amount of diagramming and outlining before I commence to actual writing again, though.    From Wordnik.com.  [I Pity the Fool : Bev Vincent] Reference

And just last week on NPR the commentator was talking about diagramming sentences and lawdy, that brought me back!.    From Wordnik.com.  [With Penguin's Viking Studio!] Reference

In my particular skull, that comes from a natural talent for language and maybe learning diagramming in high school.    From Wordnik.com.  [Writer Unboxed » Blog Archive » Toggling from editor to writer and back again] Reference

Usually, at least in my experience, the mention of diagramming sentences draws blank stares at best, disgust at worst.    From Wordnik.com.  [Going into the VP debate, what are the expectations for Sarah Palin?] Reference

One of our graphic design heroes, Nicholas Felton, released a document earlier this year diagramming his life for 2006.    From Wordnik.com.  [Build Blog » The BUILD Summary] Reference

If you think you left mythology behind in high school, along with quadratic equations and diagramming sentences, think again.    From Wordnik.com.  [Local couple puts new spin on ancient tales with ‘Dummies’ book] Reference