8 entries under noun topic. ×

3
age(period, duration, epoch)
2
geologic age(expression, quantity, number, data)
2
length of time(expression, period, duration, epoch)
1
approximation(quantity, number, data)
1
biostratigraphy(study, science, earth)
1
geology(science, rock, earth)
1
paleontology(study, science, earth)
1
time(period, duration, epoch)
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APASmart Define. (-0001). relative age thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/relative_age/thesaurus/broader
ChicagoSmart Define. -0001. "relative age thesaurus" https://smartdefine.org/relative_age/thesaurus/broader (accessed September 29, 2026).
HarvardSmart Define -0001, relative age thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/relative_age/thesaurus/broader>.
MLASmart Define. "relative age thesaurus" 30 November -0001. Web. 29 September 2026. <https://smartdefine.org/relative_age/thesaurus/broader>