An intermediate-mass black hole (IMBH) is a class of black hole with mass in the range 10^2–10^5 solar masses: significantly more than stellar black holes but less than the 10^5–10^9 solar mass supermassive black holes.(中等質量黑洞 (IMBH) 是一類質量在 10^2–10^5 太陽質量範圍內的黑洞:明顯大於恒星黑洞但小於 10^5–10^9 太陽質量的超大質量黑洞)