The phrase "a single dot" is correct and usable in written English.
It can be used when referring to one specific dot, often in contexts related to punctuation, graphics, or measurements.
Example: "In the diagram, a single dot represents the starting point of the graph."
Alternatives: "one dot" or "a lone dot".
Similarly, a very long way from the painting, it is just a single dot again.
A single dot may seem like no big deal, but many together create a nuanced portrait.
Continue with eight dots underneath that and so on, all the way to a single dot.
We are four miles from the nearest human habitation and there is not a single dot of electric light to be seen.
As each pin was driven forward, it struck an inked ribbon and transferred a single dot the size of the pinhead to the paper.
Whenever six dots appear in the same box they fuse together to form a single dot in the next box to the left.
The Snapkeys keyboard consists of four typing areas, each denoted by a different symbol: a single dot, two dots, a solid line and a circle.
Advocates for a more robust stream gauge network, like Mr. Gourley, argue that the system is a bit like a pointillist painting: the loss of a single dot would probably not change the overall picture.
Shields encourages writers to forgo safe novelistic structures in favour of a crass literalism (meeting chaos with chaos), and The Guardians proceeds in sections, each divided by a single dot, few of which run to longer than a page.
A single dot of light slowly enlarges, in the central piece, into a pair of lovers who crash through the surface of a previously invisible black pool to drown ecstatically.
"Even 100 million is still at a single dot percentage of the people we could reach," said Drew Houston, one of the founders of the company, in an interview.
