Delta (letter) different from ẟ
Pronunciation
In Ancient Greek, delta represented a voiced dental plosive IPA: [d]. In Modern Greek, it represents a voiced dental fricative IPA: [ð], like the "th" in "that" or "this" (while IPA: [d] in foreign words is instead commonly transcribed as ντ). Delta is romanized as d or dh.∆ (disambiguation)
D, d
Д, д
ẟ - Latin delta
∂ - the partial derivative symbol, sometimes mistaken for a lowercase Greek letter Delta.
ð - the small eth appears similar to a small delta, and also represents a d sound in some contexts
Th (digraph)
Thorn (letter)
Greek letters used in mathematics, science, and engineering
∇ - Nabla symbol
Delta Air Lines
SARS-CoV-2 Delta variant