Meaning of EQUATION in English

EQUATION

n.1 the process of equating or making equal; the state of being equal.

2 Math. a statement that two mathematical expressions are equal (indicated by the sign ).

3 Chem. a formula indicating a chemical reaction by means of symbols for the elements taking part.

Phrases and idioms:

equation of the first order, second order , etc. an equation involving only the first derivative, second derivative, etc.

Derivatives:

equational adj.

Etymology: ME f. OF equation or L aequatio (as EQUATE)

Oxford English vocab.      Оксфордский английский словарь.