noun

• (physics and astrophysics) An order or factor of ten.
  "2004, Cartledge et al 2004, The Homogeneity of Interstellar Oxygen in the Galactic Disk, Abstract, The Astrophysical Journal, Volume 613, Issue 2, pp. 1037-1048, The data points for low-<nH> paths are scattered more widely than those for denser sight lines, because O/H ratios for such paths shorter than 800 pc are generally about 0.10 dex lower than the values for longer ones."

noun

• (roleplaying games) Dexterity.
  "Establish a proccing percentage of a weapon by putting it in the primary hand and then put it in your offhand and check the proccing percentage with varying levels of dual wield skill (while keeping level and dex constant)."

noun

• (colloquial) Dextromethorphan.
• (medicine, colloquial) Dexamethasone.
• (colloquial) Dextroamphetamine/dexedrine.
  "Two blocks west of the Chat, in a teashop called the Jarre de Thé, Case washed down the night's first pill with a double espresso. It was a flat pink octagon, a potent species of Brazilian dex he bought from one of Zone's girls."

noun

• (roleplaying games, uncountable) Alternative form of dex (“dexterity”).
• (cryptocurrencies) Abbreviation of decentralized exchange.
  "Examining the history of how DEXs have evolved can help elucidate where DEXs are headed and how they will compete with centralized exchanges."