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Definitions

nuclear

[noo-klee-er, nyoo-, -kyuh-ler] / ˈnu kli ər, ˈnyu-, -kyə lər /
ADJECTIVE
central
Synonyms
STRONGEST
basic essential fundamental important key paramount pivotal significant
STRONG
cardinal center chief dominant interior intermediate leading master mean median middle midway primary prime radical ruling salient umbilical
WEAK
axial centric centroidal equidistant focal foremost inmost inner mid middlemost midmost omphalic outstanding overriding predominant
Antonyms
STRONGEST
additional auxiliary extra inessential insignificant minor nonessential secondary trivial unimportant unsubstantial
STRONG
exterior extreme inferior outer outside subordinate
WEAK
peripheral
ADJECTIVE
inner
Synonyms
WEAK
close constitutional essential familiar focal inherent innermore inside interior internal intestinal intimate intrinsic inward
Antonyms
WEAK
exterior external outer outside physical
ADJECTIVE
organic
Synonyms
STRONGEST
biological
STRONG
anatomical constitutional essential fundamental integral living necessary original primary prime primitive principal
WEAK
amoebic animate basal biotic cellular elemental inherent innate live plasmic structural vital
Antonyms
STRONG
accessory auxiliary extra inessential minor secondary trivial unimportant unnecessary
WEAK
inorganic man-made unnatural

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He went on to say Iran won’t have a nuclear weapon—a key focus of talks.

From The Wall Street Journal • Apr. 14, 2026

Iran does not have nuclear weapons, and the UK government has said there is "no assessment" that Iran was trying to target Europe with missiles.

From BBC • Apr. 14, 2026

Iran in turn proposed to suspend its nuclear activity for five years, which US officials rejected, The New York Times reported.

From Barron's • Apr. 14, 2026

A key goal in nuclear astrophysics is to understand where the elements come from.

From Science Daily • Apr. 14, 2026

“Under any circumstances,” he said, “it would be expected that some portion of the Soviet long-range nuclear force would strike the United States.”

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin

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