An Etymological Dictionary of Astronomy and Astrophysics

1. Physics, Math.: A statement of facts in a symbolical or general form, by substitution in which a result applicable to particular data may be obtained.
   
2. Chemistry: An expression of the constituents of a compound by symbols and figures.

Etymology (EN): From L. formula “form, rule, method, formula,” literally “small form,” from forma, → form,

• → -ule diminutive suffix.

Etymology (PE): Disul, from dis, → form, + -ul,
→ -ule.