|1.||(Arith.) A cipher; nothing; naught.|
|2.||The point from which the graduation of a scale, as of a thermometer, commences.|
|3.||Fig.: The lowest point; the point of exhaustion; |
|Noun||1.||zero - a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"|
|2.||zero - a mathematical element that when added to another number yields the same number|
|3.||zero - the quantity that registers a reading of zero on a scale|
Synonyms: zero point
|Verb||1.||zero - adjust (an instrument or device) to zero value|
|2.||zero - adjust (as by firing under test conditions) the zero of (a gun); "He zeroed in his rifle at 200 yards"|
Synonyms: zero in
|Adj.||1.||zero - indicating the absence of any or all units under consideration; "a zero score"|
|2.||zero - indicating an initial point or origin|
|3.||zero - of or relating to the null set (a set with no members)|
|4.||zero - having no measurable or otherwise determinable value; "the goal is zero population growth"|
|1.||(language)||ZERO - An object oriented extension of Z.|
["Object Orientation in Z", S. Stepney et al eds, Springer 1992].
|2.||zero - 1. |
If your zero is centre-dotted and letter-O is not, or if letter-O looks almost rectangular but zero looks more like an American football stood on end (or the reverse), you're probably looking at a modern character display (though the dotted zero seems to have originated as an option on IBM 3270 controllers). If your zero is slashed but letter-O is not, you're probably looking at an old-style ASCII graphic set descended from the default typewheel on the venerable ASR-33 Teletype (Scandinavians, for whom slashed-O is a letter, curse this arrangement).
If letter-O has a slash across it and the zero does not, your display is tuned for a very old convention used at IBM and a few other early mainframe makers (Scandinavians curse *this* arrangement even more, because it means two of their letters collide). Some Burroughs/Unisys equipment displays a zero with a *reversed* slash. And yet another convention common on early line printers left zero unornamented but added a tail or hook to the letter-O so that it resembled an inverted Q or cursive capital letter-O.