2DR
(volcanology, meteorology) Electrical discharge that occurs during a volcanic eruption, caused by a build-up of static electricity in colliding ejecta (such as ash and debris).
A small prehistoric flint tool that has serrated edges
a flourishing Mesoamerican civilization that existed in and around Guatemala from the 3rd century to the 9th century.
(double data rate (computing)): Synonym of DDR
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