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One of two or more atoms whose nuclei have the same number of neutrons but different numbers of protons.

[Alteration of isotope (with n for neutron replacing p as though for proton).]


(Chemistry) one of two or more atoms of different atomic number that contain the same number of neutrons


(ˈaɪ səˌtoʊn)

one of two or more atoms having an equal number of neutrons but different atomic numbers.
[< French (1934), alter. of isotope, by substituting n (the initial letter of neutron) for p (the initial letter of proton)]
References in periodicals archive ?
Radenovic, Common fixed point theorems for weakly isotone increasing mappings in ordered partial metric spaces, to appear in MCM, 2011
6: Let S,T be inverse semigroups and f,g are continuous isotone maps from S into T.
Other topics addressed include asymptotic oracle properties of SCAD-penalized least squares estimators, critical scaling of stochastic epidemic models, additive isotone regression, and Talagrand's convex hull concentration inequality.
The accurate dosing of two dispensers from Rieke Packaging Systems Englass were key to their selection by leading Swiss sports nutrition manufacturer WinForce for the dispensing of its "all natural" isotonic drink Isotone, Isotone--available in pomegranate-lime and lemon-juniper flavours--contains no additives, such as stabilisers, preservatives or sweeteners.
The fluid that was placed into the test reservoir was obtained from the original fluid by diluting the original fluid about 500 times using Isotone fluid.