◊

See also: ⋄ [U+22C4 DIAMOND OPERATOR], ◇ [U+25C7 WHITE DIAMOND], and ♢ [U+2662 WHITE DIAMOND SUIT]

◊ U+25CA, ◊
LOZENGE
← ◉
[U+25C9] 		Geometric Shapes ○ →
[U+25CB]

⧫ U+29EB, ⧫
BLACK LOZENGE
← ⧪
[U+29EA] 		Miscellaneous Mathematical Symbols-B ⧬ →
[U+29EC]

Translingual

Etymology

The use of this notation in modal logic was developed by C.I. Lewis.

Symbol

◊

  1. (logic, unfilled) possibility, possible, possibly
  2. (set theory) the diamond principle
  3. (calculator) subtotal
  4. (traffic) high-occupancy vehicle lane, bus lane
  5. (botany, unfilled) sex unknown[1]

Synonyms
  • (modal operator denoting possibility): M

See also

References
  1. “Botanical symbols: a new symbol set for new images”, in Botanical Journal of the Linnean Society‎, volume 162, issue 2, February 2010, →DOI, retrieved 2023-03-06, pages 117–129
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