Θ

See also: θ, θ', ө, ѳ, and ꆪ

Θ U+0398, Θ GREEK CAPITAL LETTER THETA ← Η [U+0397] Greek and Coptic Ι → [U+0399]

Translingual

Symbol

Θ

1. (set theory) Θ, the ordinal number with the same cardinality as the smallest set larger than the real numbers; the smallest nonzero ordinal number such that there exists no surjection onto it from the real numbers.
2. (physics) A pentaquark.
3. (speech pathology) Protruded tongue.

Greek

Letter

Θ • (Th) (uppercase, lowercase θ)

1. The upper case letter theta (θήτα), the eighth letter of the modern Greek alphabet.

Numeral

Θ • (Th)

1. The number nine in Greek numerals.

Derived terms

• ,Θ (,Th, “The number 9000 in Greek numerals”)

Descendants

• Ѳ, ѳ

See also

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