long-lived
Speech parts
1. long-lived - Adjective
2. long-lived - Adjective Satellite
Meaning
Having a long life; having constitutional peculiarities which make long life probable; lasting long; as, a long-lived tree; they are a longlived family; long-lived prejudices.
Source: Webster's dictionarySynonyms
Antonyms
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hopes for a durable peace
a long-lasting friendship
245 Cm– 248 Cm are long-lived with negligible decay.
After sitting for several years, the radioactivity reduces to a level where extraction of the long-lived isotopes, including technetium-99, becomes feasible.
Although carbon dioxide is the greenhouse gas primarily responsible for the rise, methane, nitrous oxide, ozone, and various other long-lived greenhouse gases also contribute.
Although hassium isotopes were first synthesized in 1984, it was not until 1996 that a hassium isotope long-lived enough to allow chemical studies to be performed was synthesized.