A zacron is a unit of length. The Earth equivalent is unknown. This unit is mentioned in the episode "The Flax", when Staanz warns the crew of a nearby flax, which was a "magna-drift mesh 75 million zacrons long."

The unit is also mentioned in the Farscape RPG, referring to the planet Tianna, which is said to be one of the few resort worlds within the Uncharted Territories and the only one within 500 million zacrons of space.

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