ION

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does ion mean? 

• ION (noun)
  The noun ION has 1 sense:

1. a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons

  Familiarity information: ION used as a noun is very rare.

 Dictionary entry details 

• ION (noun)

Sense 1

Meaning:

A particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons

Classified under:

Nouns denoting natural objects (not man-made)

Hypernyms ("ion" is a kind of...):

particle; subatomic particle (a body having finite mass and internal structure but negligible dimensions)

Hyponyms (each of the following is a kind of "ion"):

anion (a negatively charged ion)

cation (a positively charged ion)

Derivation:

ionate (add ions to)

ionic (containing or involving or occurring in the form of ions)

ionise; ionize (convert into ions)

 Context examples 

Drs. Erkan Karakas and Hiro Furukawa at Cold Spring Harbor Laboratory set out to determine the structure of the assembled NMDA receptor ion channel in order to better understand how the receptor functions.

(Structure of receptor involved in brain disorders, NIH)

PP4 forms a voltage-dependent membrane Ca(2+) channel; key amino acids act as selectivity filters and voltage sensors, regulating pore permeability to ions.

(Annexin A5 Protein, NCI Thesaurus)

When activated, they allow electrically charged ions to flow in and out of cells like water through an unlocked canal.

(Eye cells may use math to detect motion, NIH)

Proteins that include a metal ion as part of their structure or they contain a metal cofactor.

(Metalloprotein, NCI Thesaurus)

The electrons are over a thousand times lighter than the ions.

(Solar Eruptions Could Electrify Martian Moons, NASA)

This allele, which encodes copper-transporting ATPase 1 protein, plays a role in the localization of copper ions.

(ATP7A wt Allele, NCI Thesaurus)

Arsenic ion requiring five electrons to return to its elemental state.

(As5+, NCI Thesaurus/CRCH)

Arsenic ion requiring three electrons to return to its elemental state.

(As3+, NCI Thesaurus/CRCH)

Many structural (e.g. myosin) and transport (e.g. ion pump) proteins include an ATPase domain.

(ATPase, NCI Thesaurus)

ATPase, Aminophospholipid Transporter-Like, Class I, Type 8A, Member 2, encoded by the ATP8A2 gene, is an integral membrane protein has similarity to P-type ATPases, proteins that drive uphill transport of ions across membranes.

(ATPase, Aminophospholipid Transporter-Like, Class I, Type 8A, Member 2, NCI Thesaurus)