atom

atom definitions

• 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. 

• An element of a set that is not itself a set; an urelement. 

• 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.