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anhydrous

adjective Chemistry.

with all water removed, especially water of crystallization.

adjective

containing no water, esp no water of crystallization

adj.

“containing no water,” 1819, a modern coinage from Greek an-, privative prefix (see an- (1)), + hydor “water” (see water (n.1)). Greek did have anhydros “waterless,” used of arid lands or corpses that had not been given proper funeral rites.

adj.

Without water, especially water of crystallization.

Not containing water, especially water of crystallization.