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∿

sine wave

Sine wave

64/256

∿ marks a repeating sine wave. On equipment, it can identify alternating current (AC); the sine idea is much older than its electrical use.

Text symbol

What ∿ means

It marks a repeating sine pattern.

A sine wave repeats a smooth rise and fall. Mathematician Aryabhata's half-chord tables date to around 500; a half-chord is half the line joining two points on a circle. Mathematician Hérigone used sin in a 1634 book. In an 1889 engineering paper, W. M. Mordey used a wave mark for a repeating cycle. On equipment, the AC symbol ∿ marks an input; check voltage and frequency. A straight line marks direct current.

Technical, mainly used in diagrams.

Check AC versus DC before connecting a supply.

Part of the collection

Don't confuse it with

1

Questions people ask

1

Does every font show ∿?

No. A font without it may show a fallback shape or a missing-character box.

Collections with ∿

2

How to type or find ∿

Search it as
sine wave symbol · AC · tilde
Shows up in
Anything that takes text · its shape is whatever your font draws
Windows (Word)
⎇Alt+XType 223F, then AltX to get ∿.
Windows
⊞Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win .).
macOS
⌃Control+⌘Command+␣SpaceOpen the character viewer and search “sine wave”.
Linux
⎈Ctrl+⇧Shift+UType 223f, then Enter or Space.
HTML
∿
CSS
\223F
Microsoft Word
Type 223F, then press AltX.
Linux hex input
With Unicode hex input enabled, press CtrlShiftU, type 223F, then Enter.
Codes and encoding1 code points
HTML decimal
∿
HTML hex
∿
CSS content
content: "\223F";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%88%BF
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

1

Maths & numbers1,835 symbols