A zipper was a mechanism with interlocking teeth used to join two edges of fabric together.
The standard Starfleet uniform jumpsuit of the 22nd century featured pockets with zippers on the chest. (Star Trek: Enterprise)
In 2375, Geordi La Forge compared the USS Enterprise-E's warp core to a zipper, saying they were pulling it across space like one. (Star Trek: Insurrection)
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