X̂

{{Short description|Latin letter X with circumflex}}

{{Infobox grapheme

|name=X with circumflex

|letter=X̂x̂

|image=

|imagesize=

|imagealt=

|language=Aleut language, Haida language

|phonemes={{IPAblink|χ}}

|unicode=U+0058 + U+0302, U+0078 + U+0302

|equivalents=

|type=alphabet|typedesc=ic

|fam1=𐊐

|fam2=𐊐

|fam3=X x

}}

X̂ is the Latin letter X with a circumflex. The letter is used in the modern orthography of the Aleut language{{cite book |last=Bergsland |first=Knut |author-link=Knut Bergsland |url=https://archive.org/details/aleutdictionaryu0000berg |title=Aleut Dictionary = Unangam Tunudgusii: an unabridged lexicon of the Aleutian, Pribilof, and Commander Islands Aleut language |publisher=Alaska Native Language Center, University of Alaska |year=1994 |isbn=978-1-55500-047-9 |location=Fairbanks, AK}} and in the current Alaska Native Language Center alphabet of the Haida language.{{cite web |last=Lachler |first=Jordan |url=http://www.haidalanguage.org/ways-of-writing.html |title=Ways of Writing Haida |access-date=25 November 2012 }} In both cases, it represents the sound {{IPAblink|χ}}.

In mathematics, x̂ often refers to the unit vector in the +X direction. In statistics, it can also represent the predicted value for x, consistent with the hat notation.{{cite book |last1=Bailey |first1=Michael |title=Real Stats: Using Econometrics for Political Science and Public Policy |date=2021 |isbn=978-0-19-085949-7 |pages=310-311}}

{{Charmap|0058|0078|0302|name1=latin capital letter x|name2=latin small letter x|name3=combining circumflex}}