Look up ⊖ in Wiktionary, the free dictionary.
⊖ is the Unicode character "circled minus" (U+2296). ⊖ is also known as the Plimsoll symbol. ⊖ may refer to:
- Symmetric difference, the set of elements which are in either of two sets but not in their intersection
 - Erosion (morphology), one of the fundamental operations in morphological image processing
 - A function for reversal and rotation in the APL programming language
 - Symbol for the Escape character in ISO 2047
 - Used to designate a thermodynamic quantity in the Standard state in chemistry
 - Part of the notation for Standard enthalpy of reaction, as in ΔH⊖reaction
 
See also
- Celtic cross
 - Coptic cross
 - Cross symbol
 - Ø (disambiguation)
 - ⊗
 - ⊕ (disambiguation)
 - 𐃏
 - ⴲ (U+2D32, tifinagh letter yabh)
 - ⦵ (U+29B5, CIRCLE WITH HORIZONTAL BAR)
 
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