GlyphIndexDerivative
If f(x) = x², then f′(x) = 2x.
The prime labels the first derivative in this convention.
Prime sign
The prime sign ′ appears in derivatives and measurements. The surrounding notation determines whether it means a derivative, angular minutes, or another unit.
PRIME
Appearance can vary by font.
Character details
♡→✦
3 code pointsMeaning and context
The prime sign ′ appears in derivatives and measurements. The surrounding notation determines whether it means a derivative, angular minutes, or another unit.
How to use it
State the convention before using a compact label. Choose the actual prime character for mathematical notation instead of letting smart quotes change an apostrophe.
Examples
Angular minutes
1° = 60′
Here the prime means an angular minute, not a foot.
Similar shapes, different characters
Straight apostrophe
U+0027U+0027 is common in plain-text fallbacks but is a different character.
DetailsDouble prime
U+2033The double-prime character is U+2033.
DetailsSources and method
- Unicode 18.0.0 character database — Pinned standard character identities and properties; the application computes UTF encodings from the original text.
- Unicode character code charts — Reference glyphs are not a guarantee of the appearance in a user’s font.