Definition of 分界線 (ぶんかいせん)
ぶんかいせん
                        分界線
ぶんかいせん
bunkaisen
noun
•
        
line of demarcation
Related Kanji
| 分 | part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100 | 
| 界 | world, boundary | 
| 線 | line, track |