There is no RationalWiki without you. We are a small non-profit with no staff—we are hundreds of volunteers who document pseudoscience and crankery around the world every day. We will never allow ads because we must remain independent. We cannot rely on big donors with corresponding big agendas. We are not the largest website around, but we believe we play an important role in defending truth and objectivity. |
Fighting pseudoscience isn't free. We are 100% user-supported! Help and donate $5, $10, $20 or whatever you can today with ![]() ![]() |
X
Jump to navigation
Jump to search
X might refer to:
![]() |
For those of you in the mood, RationalWiki has a fun article about X. |
- X,
a letter of the roman alphabet. Very similar in appearance to the Greek letter Χ (chi)
(not to be confused with Ξ (xi)),
the Cyrillic letter Х (kha),
and the Phoenician letter taw.
- X-Mas, where the "X" is from the Greek letter chi, abbreviating the word for Christ, Χριστος.
- X is the Roman numeral
for the number 10.
- In mathematics, x is commonly the name of an independent variable or unknown value. Also typically the horizontal axis in the Cartesian coordinate system.
- Sometimes a typographic approximation
for the multiplication sign
×
. - Placeholder name for something unknown, for example in Planet X, X-Files, and Malcolm X.
- Archaic abbreviation for Χριστος (Christ) which lives on in X-Mas.
- X (social media), formerly known as Twitter.
- Indicating pornographic content, as in X-rated, or XXX.
- Fun:X