having a color like that of a ruby; deep red.
- Rubidium-strontium dating
[roo-bid-ee-uh m-stron-shee-uh m, -shuh m, -tee-uh m] /ruˈbɪd i əmˈstrɒn ʃi əm, -ʃəm, -ti əm/ noun, Geology. 1. a radiometric dating method whereby the ratio of rubidium isotope to strontium in a mineral is used to calculate the age of the mineral, based on the rate of radioactive decay of rubidium to strontium. rubidium-strontium dating […]
verb (used with object), rued, ruing. 1. to feel sorrow over; repent of; regret bitterly: to rue the loss of opportunities. 2. to wish that (something) had never been done, taken place, etc.: I rue the day he was born. verb (used without object), rued, ruing. 3. to feel sorrow, repentance, or regret. noun 4. […]
Pharmacology, Trademark. 1. a brand of ibuprofen.
adjective 1. somewhat reddish; tinged with red; rufous. adjective 1. (botany) tinged with red or becoming red