View source for Δ

{{also|Δ|△|∆|,δ|δ'|δ΄|Appendix:Variations of "d"}}
{{character info}}
{{character info/var|𝛿}}
==Translingual==

===Symbol===
{{head|mul|symbol}}

# {{lb|mul|mathematics}} A (path-dependent, [[w:inexact differential|inexact]]) [[differential]].
# {{lb|mul|mathematics}} A small [[number]], usually accompanied by [[ε]].
#: ''For any <math>\epsilon>0</math>, there is a '''<math>\delta</math>'''<math>>0</math> …''
# {{lb|mul|mathematics}} [[Kronecker delta]] or [[Dirac delta]].
# {{lb|mul|{{w|Teutonista}}}} a voiced dental plosive (IPA [[d̪|{{IPAfont|[d̪]}}]]).
# {{lb|mul|UPA}} a voiced dental fricative (IPA {{IPAfont|[[ð]]}}).

====See also====
* {{sense|differential}} {{l|mul|d}}

===Noun===
{{head|mul|noun}}

# {{lb|mul|astronomy}} {{l|en|declination}}
#: {{cot|mul|α}}

===See also===
* {{pedia|lang=en}}

==Albanian==

===Pronunciation===
* {{IPA|sq|/ð(ə)/}}

===Letter===
{{head|sq|letter|tr=dh|upper case|Δ|lower case|δ}}

# The 6th letter of the [[Arvanitic]] Albanian Greek-script alphabet.

====See also====
{{list:Greek script letters/aat}}
{{list:Latin script letters/sq}}

==Ancient Greek==

===Etymology===
Derived from its [[majuscule]] counterpart [[Δ]], from the [[Phoenician]] letter [[𐤃]], [[dalet]].

===Letter===
{{head|grc|letter|lowercase||uppercase|Δ}}

# Lower case [[delta]] ([[δέλτα]]), the fourth letter of [[Greek alphabet]]. It represented in Ancient Greek a [[w:voiced dental plosive|voiced dental plosive]]: {{IPAchar|/d/}} and in modern Greek a [[w:voiced dental fricative|voiced dental fricative]]: {{IPAchar|/ð/}}. It is preceded by [[γ]] and followed by [[ε]].

====Derived terms====
* {{l|el|δ΄}}, {{l|el|,δ}}
* {{l|mul|d}}, {{l|mul|D}} {{qualifier|Roman}}
* {{l|mul|д}}, {{l|mul|Д}} {{qualifier|Cyrillic}}
* {{l|mul|ⲇ}}, {{l|mul|Ⲇ}} {{qualifier|Coptic}}
* {{l|mul|∂}} {{qualifier|mathematics}}

====See also====
{{Grek-script}}

==Cypriot Arabic==

===Pronunciation===
* {{IPA|acy|/ð/}}

===Letter===
{{head|acy|letter|upper case|{{l|acy|Δ|sc=Latn}}|sc=Latn}}

# {{Latn-def|acy|letter|indef=a}}

==Greek==

===Etymology 1===
From the Ancient Greek letter.

====Letter====
{{head|el|letter|lowercase||uppercase|Δ}}

# Lower case [[delta]] ([[δέλτα]]), the fourth letter of [[Greek alphabet]]. It represents in modern Greek a [[w:voiced dental fricative|voiced dental fricative]]: {{IPAchar|/ð/}}. It is preceded by [[γ]] and followed by [[ε]].

====See also====
{{Grek-script}}

===Etymology 2===

====Alternative forms====
* {{l|el|δις}}

====Noun====
{{el-noun|f|inv}}

# {{abbreviation of|el|δεσποινίς||dot=:}} [[Miss]]

=====Synonyms=====
* {{l|el|δις|gloss=Miss}}

=====Coordinate terms=====
* {{l|el|κ|gloss=Mr, Mrs}}
* {{l|el|κα|gloss=Mrs}}

==Wakhi==

===Pronunciation===
* {{IPA|wbl|/ð/}}

===Letter===
{{head|wbl|letter|upper case|{{l|wbl|Δ|sc=Latn}}|sc=Latn}}

# {{Latn-def|wbl|letter|indef=a}}