(physics, dated) The standard atmospheric pressure used in certain physical measurements and calculations; conventionally, that pressure under which the barometer stands at 760 millimeters, at a temperature of 0° Centigrade, at the level of the sea, and in the latitude of Paris.
atom
atom
noun
(Canada, usually attributive) An age group division in hockey for nine- to eleven-year-olds.
(chemistry, physics) 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.
(computing, programming, Lisp) An individual number or symbol, as opposed to a list; a scalar value.
(historical) The smallest medieval unit of time, equal to fifteen ninety-fourths of a second.
(history of science) A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
(mathematics) 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").
(mathematics, set theory) An element of a set that is not itself a set; an urelement.
(now generally regarded figuratively) The smallest, indivisible constituent part or unit of something.
(philosophy) In logical atomism, a fundamental fact that cannot be further broken down.
A mote of dust in a sunbeam.
A very small amount; a whit.
moat
moat
noun
(business, figurative) An aspect of a business which makes it more "defensible" from competitors, because of the nature of its products, services or franchise or for some other reason.
(meteorology) A clear ring outside the eyewall of a tropical cyclone.
(obsolete) A hill or mound.
A circular lowland between a resurgent dome and the walls of the caldera surrounding it.
A deep, wide defensive ditch, normally filled with water, surrounding a fortified habitation.
