# Barred lambda

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> Source: https://en.wikipedia.org/wiki/Barred_lambda
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{{short description|Modified letter of the Greek alphabet}}
{{also|Latin lambda}}
{{Infobox grapheme|name=Barred lambda|image=Latin letter Lambda with stroke.svg|imageclass=skin-invert-image|imagesize=200px|imagealt=Upper and lower case of Latin barred lambda|script=[Latin script](/source/Latin_script)|typedesc=ic|phonemes={{ubl|{{IPAslink|tɬ}}}}|alphanumber=|number=|fam1=[Λ λ](/source/Lambda)|fam2=[Ꟛ λ](/source/Lambda_(Latin_letter))|usageperiod=|equivalents=|associates=|type=alphabet|letter=Ƛ ƛ|unicode=U+A7DC, U+019B|language=[Americanist phonetic notation](/source/Americanist_phonetic_notation)}} {{specialChars}}

The '''barred lambda''' (Ƛ ƛ) ({{unichar|A7DC|LATIN CAPITAL LETTER LAMBDA WITH STROKE|html=}}, {{unichar|019b|LATIN SMALL LETTER LAMBDA WITH STROKE|html=}}), is a modified letter of the [Greek alphabet](/source/Greek_alphabet), commonly encountered in North American linguistics. It is used by the [Salishan](/source/Salishan_languages) and [Wakashan languages](/source/Wakashan_languages) in [Canada](/source/Canada).<ref>{{cite web |last1=Humchitt |first1=Robyn |last2=Jacquerye |first2=Denis |last3=King |first3=Kevin |date=2023-07-17 |title=L2/23-191: Proposal to Encode 3 Additional Latin Characters for Wakashan and Salishan Languages to the Unicode Standard |url=https://www.unicode.org/L2/L2023/23191-three-latin-additions.pdf}}</ref> It is also used in [Americanist phonetic notation](/source/Americanist_phonetic_notation), where it is also known as '''running man''',<ref>[http://www.tulaliplushootseed.com/alphabet.htm] {{Webarchive|url=https://web.archive.org/web/20080703222834/http://www.tulaliplushootseed.com/alphabet.htm |date=2008-07-03 }} (strictly speaking, this refers to the [glottalized](/source/glottalized) version, {{IPAblink|t͡ɬʼ}})</ref> to transcribe {{IPAblink|t͡ɬ}}. In [physics](/source/physics), it represents the [reduced Compton wavelength](/source/Compton_wavelength), i.e. the Compton wavelength ''λ'' divided by 2{{pi}}.
{{multiple image
| width             = upright
| footer            = Cased forms of the barred lambda. The capital was assigned to Unicode in 2024.
| image1            = Unicode 0xA7DC.svg
| class1            = skin-invert-image
| alt1              = Capital letter barred lambda
| image2            = Unicode 0x019B.svg
| class2            = skin-invert-image
| alt2              = Small letter barred lambda
}}
It was first used in a phonetics context in ''[American Anthropologist](/source/American_Anthropologist)'' in 1934:
{{cquote|[λ](/source/%CE%BB) for [''dl''] has been used in Eskimo by Jenness ... ƛ for [''tł''] is an innovation formed from λ as ''[ł](/source/%C5%82)'' from ''l''.<ref>{{cite journal | author=Herzog, George | author-link=George Herzog | author2=Newman, Stanley S. | author3=Sapir, Edward | author3-link=Edward Sapir | author4=Swadesh, Mary Haas | author4-link=Mary Haas | author5=Swadesh, Morris | author5-link=Morris Swadesh | author6=Voegelin, Charles F. | author6-link=Charles F. Voegelin |date=Oct–Dec 1934 | title=Some orthographic recommendations | journal=American Anthropologist | volume=36 | issue=4 | pages=629–631 | doi=10.1525/aa.1934.36.4.02a00300| doi-access=free }}</ref>
}}
It is also used for the affricate [t͡ɬ] in transcribing the [Sahaptin language](/source/Sahaptin_language), e.g., iƛúpna ‘he jumped’, and it is commonly used for the same purpose in several [languages of the Caucasus](/source/languages_of_the_Caucasus). In addition, its counterpart with a combining comma above right (U+0315), {{Ill|Barred lambda with comma|lt=ƛ̓|fr|ƛ̓}}, is used for many of the Salish languages, such as [Klallam](/source/Klallam_language), for an ejective lateral affricate [t͡ɬʼ].

== Encodings ==
{{charmap|A7DC|019B
| name1            = LATIN CAPITAL LETTER LAMBDA WITH STROKE
| name2            = LATIN SMALL LETTER LAMBDA WITH STROKE
}}

== References ==
{{reflist}}

{{Latin script|L
| show diacritic = stroke
| show pairs = no
}}{{Latin-script-stub}}{{DEFAULTSORT:Lambda - barred}}
Category:Latin-script letters
Category:Phonetic transcription symbols

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Adapted from the Wikipedia article [Barred lambda](https://en.wikipedia.org/wiki/Barred_lambda) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Barred_lambda?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.