Definition of Atom

1. Noun. (physics and chemistry) the smallest component of an element having the chemical properties of the element.

Generic synonyms: Substance
Category relationships: Chemical Science, Chemistry, Natural Philosophy, Physics
Terms within: Elementary Particle, Fundamental Particle, Nucleus
Specialized synonyms: Isotope, Monad, Carbon Atom, Hydrogen Atom, Free Radical, Radical
Group relationships: Chemical Element, Element, Molecule
Derivative terms: Atomic, Atomise, Atomise, Atomize

2. Noun. (nontechnical usage) a tiny piece of anything.
Exact synonyms: Corpuscle, Molecule, Mote, Particle, Speck
Specialized synonyms: Grain, Grinding, Chylomicron, Flyspeck, Identification Particle
Generic synonyms: Material, Stuff
Derivative terms: Atomic, Atomise, Molecular

Definition of Atom

1. n. An ultimate indivisible particle of matter.

2. v. t. To reduce to atoms.

Definition of Atom

1. the smallest unit of an element [n -S] : ATOMIC, ATOMICAL [adj]

Medical Definition of Atom

1. A particle of matter indivisible by chemical means. It is the fundamental building block of the chemical elements. The elements, such as iron, lead and sulphur, differ from each other because they contain different kinds of atoms. There are about six sextillion (6 followed by 21 zeros or 6 x 1021) atoms in an ordinary drop of water. According to present day theory, an atom contains a dense inner core (the nucleus) and a much less dense outer domain consisting of electrons in motion around the nucleus. Atoms are electrically neutral. (16 Dec 1997)

Lexicographical Neighbors of Atom

atoc
atocia
atocias
atocs
atok
atokal
atoke
atokes
atokous
atokous
atoks
atole
atoll
atolls
atom (current term)
atom (current term)
atom-bomb
atomic
atomic
atomical
atomical
atomically
atomically
atomician
atomicism
atomicities
atomicity
atomicity
atomics
atomic absorption spectrophotometry

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