noun
functional unit; arithmetic unit
Computing term for a hardware or logical unit that performs operations, especially in analog computing contexts.
アナログ計算機では、演算器が加算や積分を行う。
In an analog computer, the functional unit performs addition and integration.
Compound of 演算 (calculation) and 器 (device, instrument). The exact historical derivation is uncertain; the term is used in technical computing contexts.