放ほう射しゃ年ねん代だい

noun

radiometric age

Technical term used in geology, archaeology, and related fields for age determined by radiometric dating methods.

• この化か石せきの放ほう射しゃ年ねん代だいは約やく1いち万まん年ねん前まえと推すい定ていされた。

  The radiometric age of this fossil was estimated to be about 10,000 years.