x
Math's mystery letter
X is the twenty-fourth letter of the English alphabet.
As a symbol, x marks a spot, indicates a wrong answer, or represents an unknown quantity in algebra.
In informal writing, x can stand for a kiss at the end of a message: Love you, Mom xxx.
To x something out is to cross it through. (Capitalized X may refer to the social media platform or various proper names.)
Not yet discovered
- algebraMath using symbols
- equationMathematical equality assertion
- solveFind the answer
- axisRotation reference line
coordinate · polynomial · quadratic · intercept · slope · graph · function · placeholder
Product-finding operation
- timesOccurrences or multiplications
- productManufactured item for sale
- factorContributor to result
- calculateDetermine through math
arithmetic · double · triple · quadruple · numerical · computation · algorithm · cross-multiply
Handwritten name for verification
- signMark conveying information
- illiterateCannot read or write
- checkboxToggleable selection indicator
- spotMark or location
Something unexplained or unknown
- enigmaSomething hard to fathom
- variableProne to fluctuation
- placeholderTemporary position marker
- anonymityUnknown identity state
redacted · classified · secret · cipher · code · incognito · anonymous · pseudonym
Not accurate or true
Language's letter system
- glyphVisual form of character
- characterNature, symbol, or role
- typographyArranging letters for display
- fontCharacter style set
serif · sans-serif · calligraphy · typeface · uppercase · lowercase · script · cursive
Science of hereditary transmission
- DNAHereditary code molecule
- femaleOffspring-bearing sex
- maleSperm-producing sex
- sex-linkedCarried on chromosomes determining gender
heredity · allele · gene · karyotype · mutation · inheritance · Y-chromosome · trait
unknown
Not yet discovered
axis · coordinate · polynomial · quadratic · intercept · slope · graph · function · placeholder · coefficient
multiplication
Product-finding operation
calculate · arithmetic · double · triple · quadruple · numerical · computation · algorithm · cross-multiply
signature
Handwritten name for verification
- signMark conveying information
- illiterateCannot read or write
- checkboxToggleable selection indicator
mystery
Something unexplained or unknown
- enigmaSomething hard to fathom
- variableProne to fluctuation
- placeholderTemporary position marker
anonymity · redacted · classified · secret · cipher · code · incognito · anonymous · pseudonym
incorrect
Not accurate or true
cancel · delete · reject · fail · test · exam · grading · correction
alphabet
Language's letter system
- glyphVisual form of character
- characterNature, symbol, or role
- typographyArranging letters for display
font · serif · sans-serif · calligraphy · typeface · uppercase · lowercase · script · cursive · italic
genetics
Science of hereditary transmission
sex-linked · heredity · allele · gene · karyotype · mutation · inheritance · Y-chromosome · trait · recessive
love
Intense fond attachment
greeting · romantic · smooch · endearment
adult
Mature person, legally responsible
- explicitClearly and directly expressed
- matureFully grown or developed
- restrictedLimited in scope
censored · movie · film · content · warning · parental · unsuitable
Fixed, unvarying quantity
given · known quantity · known · answer · ordinal
- x-ray visionAbility to see through walls
- the X factorIndescribable winning quality
- X-ray radiationShort-wavelength electromagnetic emission
- Malcolm X
- dental x-raysDiagnostic mouth imaging
- X marks the spotTreasure location indicator