X2 may refer to:
Computers[edit]
- X2 (protocol), a pre-V.90 standard for 56k downstream modem communications
- Athlon 64 X2, the first dual-core desktop CPU manufactured by AMD
- A two-lane PCI Express, slot
- A type of 10 Gigabit Ethernet, optical transceiver
- X2, a transport interface used to connect enodeBs in a LTE/4G network
Vehicles and transportation[edit]
Aircraft, spacecraft and rockets[edit]
- Bell X-2, an experimental supersonic aircraft
- Mitsubishi X-2 Shinshin, a Japanese experimental stealth fighter (formerly known as ATD-X)
- Orba, also known as X-2, a planned British satellite
- Sikorsky X2, a prototype, coaxial high-speed helicopter
- Skycycle X-2, a rocket used by Evel Knievel
- SpaceShipOne flight 17P, also known as X2, the second Ansari X Prize flight
- X-2 Dragonfly, the company designation of the Rotor-Craft XR-11 experimental helicopter of the late 1940s
- X-2 Rocket, the spacecraft used in Mission: Space in Epcot Center, Orlando, Florida
Watercraft[edit]
- Bathyscaphe Trieste II, also known as X-2, the US Navy bathyscaphe based on the Trieste
- HMS X2, a Royal Navy submarine
- Kawasaki X2, a personal water craft
Other vehicles and transportation[edit]
- BMW X2, a SUV vehicle produced by BMW
- North Wing Sport X2, an American ultralight trike design
- SJ X2, used for the X 2000 train system in Sweden
- X2 (New York City bus), a bus route
- X2, a Metrobus route, in Washington, D.C.
Video games[edit]
- Dance Dance Revolution X2, a 2010 music video game for the PlayStation 2
- Final Fantasy X-2, a 2003 role-playing video game
- Mega Man X2, a 1994 platform game
- X2: The Threat, a 2003 space simulation game
- X2 (video game), a 1997 video game
- X2, the main character in Star Wars Battlefront: Elite Squadron
Film[edit]
- X2 (film), a 2003 sequel to the 2000 film X-Men
- XXX: State of the Union, also known as X2 or xXx²: The Next Level, a 2005 American film
Phones[edit]
- Nokia X2, feature phone/smartphone
- Sendo X2, a Series 60 mobile phone
- Sony Ericsson Xperia X2, smartphone
Other[edit]
- X2 (roller coaster), at Six Flags Magic Mountain
- Chi-squared distribution, a theoretical probability distribution in inferential statistics
- Square (algebra), also known as the algebraic square
- Keyboard sold by Korg in the 1990s
- X-2 Counter Espionage Branch, counterintelligence branch of the Office of Strategic Services
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction