rubidium-strontium dating

NOUN
25 LETTERS · 7 SYLLABLES · STARTS WITH R

rubidium-strontium dating is a valid 25-letter word worth 32 points in Scrabble and 41 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1U1B3I1D2I1U1M3-0S1T1R1O1N1T1I1U1M3D2A1T1I1N1G2
1 + 1 + 3 + 1 + 2 + 1 + 1 + 3 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 0 + 2 + 1 + 1 + 1 + 1 + 2 =32 PTS
DOUBLE WORD → 64TRIPLE WORD → 96
MEANING

What does rubidium-strontium dating mean?

NOUN · 1 SENSE
1

Geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years.