noun
constant of integration
Technical term in calculus; the arbitrary constant added to an indefinite integral.
不定積分を求めるときは、積分定数Cを忘れずに付け加えてください。
When finding an indefinite integral, don't forget to add the constant of integration C.
Compound of 積分 (integration) and 定数 (constant). A straightforward calque from Western mathematical terminology.