Rare Japanese term for the @ symbol; the loanword アットマーク is the usual word.
See also: アットマーク
単価記号 is a Japanese translation of 'at sign,' but normally people say アットマーク.
The standard Japanese word for the @ symbol; 単価記号 is a rare, literal kanji equivalent.
Compound of 単価 (unit price) and 記号 (symbol), referring to the @ sign's historical commercial use meaning 'at the rate of.'