noun
bloodstain; blood spot
Refers to a stain or spot of blood, often used in forensic or crime contexts.
現場には血痕が残っていた。
Bloodstains remained at the scene.
シャツに小さな血痕がついている。
There is a small bloodstain on the shirt.
Compound of 血 (blood) and 痕 (mark, trace). The reading けっこん follows the standard on'yomi of the characters.