分断後部
ぶんだんこうぶ
widow (one or more lines separated from the rest of the preceding passage by page or column break)
分断前部 is read as ぶんだんぜんぶ (bundanzembu) and means orphan (one or more lines separated from the rest of the following passage by page or paragraph break).
ぶんだんぜんぶ
bundanzembu
ぶんだんこうぶ
widow (one or more lines separated from the rest of the preceding passage by page or column break)