noun
equivalence; equality of value
Refers to things having the same worth or being of equal value, often used in formal or technical contexts.
この二つの商品は等価値とみなされる。
These two products are considered to be of equal value.
等価値の交換が成立した。
An exchange of equal value was established.
同等 means 'equality' in rank or status, whereas 等価値 focuses on equality in value or worth.
Compound of 等 (equal) + 価値 (value). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning of equal value.