An element of a set that is not itself a set; an urelement.
The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
In logical atomism, a fundamental fact that cannot be further broken down.
The smallest medieval unit of time, equal to fifteen ninety-fourths of a second.
An age group division in hockey for nine- to eleven-year-olds.
A mote of dust in a sunbeam.
A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
The smallest, indivisible constituent part or unit of something.
A very small amount; a whit.
A non-zero member of a partially ordered set that has only zero below it (assuming that the poset has a least element, its "zero").
An individual number or symbol, as opposed to a list; a scalar value.
An upper bound of a set which is also an element of that set.
A scoring shot for 6 runs.
The greatest value of a set or other mathematical structure, especially the global maximum or a local maximum of a function.
A 147 break; the highest possible break.
A score of 180 with three darts.
The highest limit.
The largest value of a batch or sample or the upper bound of a probability distribution.
To the highest degree.