Ø (disambiguation)

For the album, see Ø (Disambiguation).

Ø (and ø) is a Scandinavian vowel letter.

The letter Ø or the symbol ∅ (a circle crossed by a diagonal slash) etc. may also refer to:

Language

• Close-mid front rounded vowel (IPA: ø)
• Zero (linguistics) (∅)
• Berber Academy yah (ⵁ), a Tifinagh letter, corresponding to "h"

Science, technology and engineering

• Slashed zero (0̸), a representation of the number 0 (zero) to distinguish it from the letter O
• Slashed letter 'O' (O̸), a representation of the letter O to distinguish it from the number 0 (zero)
• The symbol for diameter (⌀), U+2300 in Unicode
• A symbol to represent a phenyl group
• Empty set ($\varnothing$ or ∅ as a character) in mathematical set theory, U+2205 in Unicode

Other uses

• Ø, Denmark, a piece of land in Jutland, Denmark
• Half-diminished seventh chord (^ø), in music
• Ø, the solo identity of Finnish musician Mika Vainio of electronic music band Pan Sonic

Similar symbols

Circle with a diagonal slash

• Circled division slash (⊘), U+2298 in Unicode
• No entry sign (🚫), U+1F6AB in Unicode

Circle crossed by a vertical bar

• Voiceless bilabial fricative (IPA: ɸ)
• Phi (Φ and φ), a Greek letter, corresponding to "f" or "ph"
  • Several uses of phi as a symbol for angles, etc.
• Ef (Cyrillic) (Ф and ф), a Cyrillic letter, corresponding to "f" or "ph"

Circle with a vertical bar

• Yah (ⵀ), a Tifinagh letter, corresponding to "h" or "b"

Circle with a horizontal bar

• Voiceless dental fricative (IPA: θ)
• Theta (Θ and θ), a Greek letter, corresponding to "th"
• Theta nigrum (ꝋ) for "obiit" ="died"
• Fita (Ѳ and ѳ), an Old Cyrillic letter, corresponding to "f" and transliterating Greek theta
• Oe (Cyrillic) (Ө and ө), Cyrillic barred O, representing an open-mid front rounded vowel in some Turkic and Mongolic languages
• Yab (ⴱ), a Tifinagh letter, corresponding to "b"
• Load line mark (⦵), showing the maximum draft of a ship
• Standard state (⦵), in chemistry

See also

• Circle symbol (disambiguation)
• Null (disambiguation)
• Null symbol (disambiguation)
• Barred O (disambiguation)
• 0 (disambiguation)
• Theta (⦰), in trigonometry