⊞

See also: 田 [U+7530 CJK UNIFIED IDEOGRAPH-7530], and 𐌎 [U+1030E OLD ITALIC LETTER ESH]

⊞ U+229E, ⊞ SQUARED PLUS ← ⊝ [U+229D] Mathematical Operators ⊟ → [U+229F]

Translingual

Etymology

Compare ⊟, ⊠, and ⊡.

Symbol

⊞

1. (mathematics) Generic symbol for an addition-like operation, to distinguish it from addition denoted with +.
2. (functional analysis) Free additive convolution.
3. (computing) Unofficial symbol for the Windows Key because of its resemblance to the Windows logo, and is nearly identical to the Windows 11 logo.

Related terms

• ⊡