⊠

See also: 🝱

⊠ U+22A0, ⊠ SQUARED TIMES ← ⊟ [U+229F] Mathematical Operators ⊡ → [U+22A1]

Translingual

Etymology

Compare ⊞, ⊟, and ⊡.

Symbol

⊠

1. (functional analysis) Free multiplicative convolution
2. (computing, dated) ISO 2047 symbol for Enquiry
3. (electricity) control cabinet

Usage notes

The alternative symbol of Enquiry looks similar to thicker ✠, which is not available in Unicode.