Purseronite is a chemical element listed on the Table of Elements. It is a member of the hypersonic series. (TNG: "Rascals")

The element purseronite had the symbol "Tm", which is the same atomic symbol used for thulium.
The elements in the table included in-jokes to the production staff. (Star Trek: The Next Generation Companion) This element was named after construction worker Tom Purser.
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