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This is hard to describe, but I'm curious about what the proper word is for these thingies in English.

So I searched for a picture on Google and circled what I'm referring to with red:

Puzzle piece with the questionable parts circled with red.

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1  
My brain has decided they're called "knobs", but I've absolutely no proof anyone else calls them that. –  Yamikuronue Nov 8 '11 at 13:15
    
We always called them "bobbles" (or perhaps "blobbles"). –  Colin Fine Nov 8 '11 at 13:47
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Pretty obscure. I don't think most English speakers know a word for that. –  Joe Nov 8 '11 at 14:40
    
@Joe That was my first thought. I love doing puzzles and I've never called them anything. –  JustinY Nov 8 '11 at 15:57
    
Jigsaw enthusiasts might have a word but I wouldn't know what to call them in normal English. –  TheMathemagician Mar 27 at 9:57
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6 Answers

up vote 37 down vote accepted

This kind of puzzle is called a jigsaw puzzle, and the corresponding Wikipedia page uses the terms tabs and blanks. (The parts you've circled are the tabs.)

Looking further throws up many citations for "tabs": this book on DNA computing calls them jigsaw tabs (and pockets), this book on programming also mentions interlocking tabs, this issue of Make magazine calls them jigsaw tabs (and slots), and there are lots of other books. There seems to be more consensus on what to call the circled pieces you want (tabs) and less on what to call the other kind (blanks, pockets, slots, indents...).

You can also trawl through search results for jigsaw (tab OR tongue OR outie), to compare the answers suggested. (Need to look at each result individually to make sure the word is used in the right context. In fact most results aren't about the context we want. :-))

However, it is also a fact that there is no universally accepted terminology. For instance, this book on the history of jigsaw puzzles says on page 10 that

Despite a few attempts at a comprehensive classification of piece shapes and cutting designs, there is still no generally accepted nomenclature. Manufacturers use a variety of terms, as do puzzlers. Puzzle pieces can have "loops" and "sockets", "knobs" and "holes", "tabs" and "slots", "keys" and "locks", or any of several other alternative designations.

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Thanks! I'm accepting your answer because you also added the blanks term. :) –  Venemo Nov 8 '11 at 12:05
    
@Venemo: Unfortunately, I just updated my answer to show that blanks may not be universal. :-) But tabs seems to be used widely. –  ShreevatsaR Nov 8 '11 at 12:07
    
How do you call the act of connecting the pieces, i.e. "some repeating patterns makes it harder to compose the puzzle"? –  Shimmy Jul 16 '13 at 14:21
    
Well according to the wiki link you provided, I've learned it's "assembling puzzles" –  Shimmy Jul 16 '13 at 14:23
    
Just as a curiosity - I have never, ever, ever heard them referred to as either tabs or blanks ..... and I work in a related software engineering field. –  Joe Blow Mar 27 at 9:24
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Speaking as a fully-qualified jigsaw puzzle solver, I can say that the standard word is an outie. Terminology shared with belly-buttons, except normally only jigsaw outies interlock with innies.

According to this glossary people also call them tabs or knobs, but the problem there is they don't have an obvious term for the corresponding innie, so I'd stick with outie. A jigsaw is a game anyway, so there's nothing wrong with using childish terminology.

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Innie and outie sounds a bit more casual than tab and blank. –  Venemo Nov 8 '11 at 12:06
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Oh, before your edit I thought that "fully-qualified jigsaw puzzle solver" meant that you had participated in some state-/national-level jigsaw puzzle-solving competitions or something like that. :-) I would be disappointed to learn that no such thing exists. –  ShreevatsaR Nov 8 '11 at 12:19
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@ShreevatsaR: Nah - my qualifications aren't quite so formally-recognised. But I did spend a lot of time in hospital throughout my childhood, and there wasn't much else to do there for several weeks every year! –  FumbleFingers Nov 8 '11 at 12:59
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All I can suggest is tongue, as in the joint in carpentry known as tongue and groove.

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You make me think, "dog" wold be a great term here. (Since it is, exactly that, a dog.) I wonder does anyone know, what's the female version of a dog called? Probably a sailor or old-days carpenter would know this? –  Joe Blow Mar 27 at 9:44
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Looking at the Wikipedia article on jigsaw puzzles, they use the word tab:

Some fully interlocking puzzles have pieces all of a similar shape, with rounded tabs out on opposite ends, with corresponding blanks cut into the intervening sides to receive the tabs of adjacent pieces.

(emphasis added)

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Who cares what someone writing on Wikipedia, used to describe the issue? So what? The person writing there is not saying "the word usually used is 'xyz', the person writing there is simply describing them. (Exactly as the OP describes them in some other way.) –  Joe Blow Mar 27 at 9:25
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I believe 'tenon' and 'mortice' are the appropriate technical terms.

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That's interesting, considering everything else suggested on this page doesn't mention either. What leads you to this conclusion? –  Matt Эллен Mar 14 '12 at 21:25
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@MattЭллен: I don't know about jigsaw puzzles, but these are the preferred terms in woodworking en.wikipedia.org/wiki/Mortise_and_tenon. I, personally, would find it natural to borrow terms from woodworking (if they didn't exist already). And so, I +1'd it. But that's just what I'm inclined to do. –  prash Mar 14 '12 at 21:31
    
but then, I'm not an expert at woodworking either. Though "mortice and tenon" is a very specific kind of joint, the same terms are used for a few other types of joints. –  prash Mar 14 '12 at 21:53
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+1: Given that jigsaw puzzles originated in woodworking, I think this is a plausible conjecture. I am used to seeing it spelled mortise, however, but either is correct. –  Robusto Apr 8 '12 at 14:29
    
It is exactly, precisely correct that tenon and mortice are appropriate technical terms. I don't know if you can say they are "the" technical terms. –  Joe Blow Mar 27 at 9:26
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There's a very important point here:

In English, it's reasonably common that - strangely enough - there IS NO WORD for a certain fairly common thing.

(There's possibly actually a term for this phenomenon - like "grasp words" or "thingy words" or something.)

Note for example, Justin's first comment on the question - which is totally correct and typical.

I have never, ever, ever heard them referred to in any way, in English, other than something like "the thingy that sticks out" "the hole thing on the edge" "the whatever tonguey thingy"

Note that even if you look at software (like the actual computer code, in c# of whatever, relating to machines that cut puzzles) you just seeterms like TheOutThingy OneOfTheHoleThings and so on.

Again - in my opinion - among English speakers it's reasonably common that - strangely enough - there IS NO WORD for a certain fairly common thing. We stick with "thingy phrases" and sort of deliberately don't settle on a word. IMO the - thingies - on jigsaws are a perfect example of this.

So, IMO, there is literally no word for these in English - even among jigsaw aficionados or in the games industry.

{A small point: Note too that the jigsaw-puzzle industry is largely German, as it happens, so you could possibly look to the German language for guidance here, if you're trying to "decide on" what we should all call these thingies.}

{Another small point - note that, wildly confusingly, "jigsaw puzzles" are called "jigsaw puzzles" in certain English speaking areas, BUT, are called .. wait for it .. "puzzles" in other English speaking areas.}

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Thanks, nice thought! I've already settled with 'tab' and 'blank' (because they were shorter), but it's always nice to see more insight into English :) –  Venemo Mar 27 at 12:05
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protected by RegDwigнt Aug 1 '12 at 8:55

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