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Chapter 10
Standardized symbols
10.17.
Symbols duly standardized by any national scientific, professional, or technical group are accepted as preferred forms within the field of the group. The issuing office desiring or requiring the use of such standardized symbols should see that copy is prepared accordingly.
Signs and symbols
10.18.
The following list contains some signs and symbols frequently used in printing. The forms and style of many symbols vary with the method of reproduction employed. It is important that editors and writers clearly identify signs and symbols when they appear within a manuscript.
ACCENTS
- ˊ acute
- ˘ breve
- ¸ cedilla
- ˆ circumflex
- ¨ dieresis
- ˋ grave
- ˉ macron
- ˜ tilde
ARROWS
- → direction
- ↖ direction
- ⮣ direction
- ⤴̣ direction
- ⤵̣ direction
- ⬅ bold arrow
- ⇨ open arrow
- ⇄ reversible reaction
BULLETS
- ● solid circle; bullet
- • bold center dot
- • movable accent
CHEMICAL
- ‰ salinity
- ♏︎ minim
- ⇵ exchange
- ↑ gas
CIRCLED SYMBOLS
- ◷ angle in circle
- ⦷ circle with parallel rule
- ⎊ triangle in circle
- ⊙ dot in circle
- ◬⃝ dot in triangle in circle
- ⊕ cross in circle
- © copyright
- ① Ceres
- ② Pallas
- ③ Juno
- ④ Vesta
CODE
- • No. 1 6 pt. code dot
- • No. 2 8 pt. code dot
- • No. 3 10 pt. code dot
- ● No. 4 8 pt. code dot
- ● No. 4 10 pt. code dot
- — No. 1 6 pt. code dash
- — No. 2 8 pt. code dash
- — No. 3 10 pt. code dash
- ➖ No. 4 8 pt. code dash
- ➖ No. 4 10 pt. code dash
COMPASS
- ° degree
- °̣ degree with period
- ′ minute
- ′̣ minute with period
- ″ second
- ″̣ second with period
- ″̲ canceled second
DECORATIVE
- ✚ bold cross
- ✠ cross patte
cross patte
cross patte- 🏶 (184 N)
- 🗝 key
- ❦ (206 N)
- ¶ paragraph
ELECTRICAL
- 𝓡 reluctance
- ↔ reaction goes both right and left
- ↕ reaction goes both up and down
- ↕ reversible
- → direction of flow; yields
- → direct current
- ⇆ electrical current
- ⇆ reversible reaction
- ⇄ reversible reaction
- ⇆ alternating current
- ⇄ alternating current
- ⇌ reversible reaction beginning at left
- ⇋ reversible reaction beginning at right
- Ω ohm; omega
- MΩ megohm; omega
- μΩ microohm; mu omega
- ω angular frequency, solid angle; omega
- Φ magnetic flux; phi
- Ψ, dielectric flux; electrostatic flux; psi
- γ conductivity; gamma
