Δ

Δ

1. (mathematics, sciences) alternative form of ∆: change in a variable
2. (chemistry) Used on the reaction arrow in a chemical equation, to show that energy in the form of heat is added to the reaction
3. (mathematics, set theory) Used to represent the symmetric difference (also known as the disjunctive union) of two sets
4. (genetics) Used before a gene name as a modifier to denote a deletion mutation of that gene.
5. (music) Used after a pitch class to denote a major seventh chord with a note of said pitch as its root.

(mathematics): Unicode establishes a distinct symbol (∆) for particular use in mathematics, but Δ is often substituted for convenience.

• Δ on Wikipedia.Wikipedia

Δ

1. (law) Abbreviation of defendant.

• IPA^(key): /ð(ə)/

Δ (Dh) (upper case Δ, lower case δ)

1. The 6th letter of the Arvanitic Albanian Greek-script alphabet.

• Greek script letters (script appendix): Α α, Β β, B b, Γ γ, Γϳ γϳ, Δ δ, D d, Ε ε, Ε̱ ε̱, Ζ ζ, Ζ̇ ζ̇, Θ θ, Ι ι, Ϳ ϳ, Κ κ, Κ̇ κ̇, Λ λ, ΛΛ λλ, Λ̇ λ̇, Μ μ, Ν ν, Ν̇ ν̇, Ο ο, Π π, Ρ ρ, Ρ̇ ρ̇, Σ σ, Σ̈ σ̈, Τ τ, Ȣ ȣ, Υ υ, Φ φ, Χ χ, Χ̇ χ̇, ΤΣ τσ, ΤΣ̈ τσ̈, DΣ dσ, DΣ̈ dσ̈ ^[edit]

• (Latin-script letters) shkronjë; A a, B b, C c, Ç ç, D d, Dh dh, E e, Ë ë, F f, G g, Gj gj, H h, I i, J j, K k, L l, Ll ll, M m, N n, Nj nj, O o, P p, Q q, R r, Rr rr, S s, Sh sh, T t, Th th, U u, V v, X x, Xh xh, Y y, Z z, Zh zh

From the Phoenician letter 𐤃 (d, “dālet”).

Δ • (D) (uppercase, lowercase δ)

1. The letter delta (δέλτα (délta)), the fourth letter of the ancient Greek alphabet.

• (Cyrillic) Д
• (Coptic) Ⲇ
• (Gothic) 𐌳

• (Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
• (non-Classical letters) Ϝ (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (S) ϻ (s), Ϟ ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨

Δ • (X)

1. A digit 10 in the decimal acrophonic numeral system that predated the gematria system. An abbreviation of δέκα (déka, “ten”). Equivalent to the Roman numeral X.

The basic acrophonic units are Ι 1, 𐅃 5, Δ 10, Η 100, Χ 1000 and Μ 10,000. Δ is iterated for ΔΔ 20, ΔΔΔ 30 and ΔΔΔΔ 40, and combines with 𐅃 for 50.

• 𐅉 10 talents, 𐅐 10 staters, 𐅗 10 minas
• 𐅄 50

• IPA^(key): /ð/

Δ (lower case δ)

1. A letter of the Cypriot Arabic alphabet, written in the Latin script.

Δ • (D)

1. abbreviation of δυτικός (dytikós, “west, westerly”)

Δ • (D)

1. abbreviation of δύση (dýsi, “west”)

• Appendix:Greek compass points

Δ • (D) (uppercase, lowercase δ)

1. The upper case delta (δέλτα), the fourth letter of the modern Greek alphabet, representing a voiced interdental fricative (/ð/).

• (Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
• (non-Classical letters) Ϝ (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (S) ϻ (s), Ϟ ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨

• (Glagolitic): Ⰴ, ⰴ

• Δ΄
• ͵Δ

• IPA^(key): /ð/

Δ (lower case δ)

1. A letter of the Wakhi alphabet, written in the Latin script.