𝕏

A double-struck (“formed in a blackboard bold typeface, in which certain lines of a character are doubled”) capital letter X. The upper left diagonal line is made up of two strokes, while the lower left diagonal is a single line that stops at the boundary of the double-struck stroke before continuing beyond it—creating an interruption of only white space within the double-struck line.

Ultimately derived from x (“name for an unknown variable”), by analogy with other blackboard bold mathematical symbols; see blackboard bold § usage on WikipediaWikipedia .

𝕏

1. (mathematics) Used to denote an arbitrary metric space.

From the logo of X, a bolded black 𝕏, adopted on 23 July 2023 to replace the previous logo of the stylised blue silhouette of a bird in flight;^[1][2] compare 🐦.

𝕏

1. (Internet slang, neologism) X (formerly Twitter): an online social networking service.

   Synonym: 🐦

   • 2023 July 24, @joeylknight, Twitter‎^[3] (in English):

     𝕏, The Everything App

   • 2023 September 13, u/Fernmeldeamt, “2 Elektro Ingi's, 3 Meister, 5 Fachkräfte nach eine ganze wochenende umbau. [2 electrical engineers, 3 masters, 5 skilled workers after a whole weekend of renovation.]”, in r/Elektroinstallation‎^[4] (in German), Reddit:

     Worin liegt denn der Wert dieses Posts? Gehört wohl eher auf 𝕏, statt auf Reddit - und einen Diskurs regt der Post jetzt auch nicht an. "Fachkräftemangel" weil man die Plattform nicht verstanden hat.

     What is the value of this post? It probably belongs on 𝕏 rather than on Reddit - and the post doesn't stimulate any discourse. "Skilled labor shortage" because people didn't understand the platform.

   • 2023 December 12, u/crumblingheart, “With friends like these: Tucker Carlson ditching Xitter to launch his own streaming service”, in r/EnoughMuskSpam‎^[5] (in English), Reddit:

     But what about those billions of views he got on 𝕏? Is he really going to walk away and leave that all behind?

   • 2024 June 25, u/Phantom_Zac, “Make onchain transactions without leaving 𝕏”, in r/Phantom‎^[6] (in English), Reddit:

     With Blinks, powered by Solana Actions, you can now make onchain transactions such as swapping, staking, minting, voting, and more right from 𝕏 using your Phantom wallet 👻

   • 2024 August 25, @elonmusk, Twitter‎^[7] (in English):

     It is vital to the support of free speech that you forward 𝕏 posts to people you know, especially in censorship-heavy countries

   • 2025 March 10, Elijah Schaffer, “In Defense of "Xenophobic Nationalism" - Sarah Stock HUMILIATES Woke Podcaster Sam Seder”, in Slightly Offensive‎^[8] (in English):

     In response to her sudden surge in viral fame, Sarah took to 𝕏 to share her thoughts: […]

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