simple past tense and past participle of die down

Having two heads. / (numismatics) Of a coin, having a head on both sides, especially when counterfeited by being constructed from two separate coins.

(archaic) unmoved; motionless; at rest / (archaic) Unchanged; unaltered; unaffected.

(astrophysics, cosmology, astronomy, physics) The known universe; the part of the universe that is not part of the dark sector; the segment of the universe that is explained by the known laws of ph...