coming in a direct line from an earlier or later generation of the same family as somebody 直系的；嫡系的 a lineal descendant of the company’s founder 公司创始人的直系后裔
Oxford Collocations DictionaryLineal is used with these nouns:- descendant
- descent
Word Originlate Middle English: via Old French from late Latin linealis, from linea ‘a line’.