fil|i|al «FIHL ee uhl», adjective.
1. of a son or daughter; due from a son or daughter toward a mother or father: »
filial affection. The children treated their parents with filial respect.
2. Genetics. of any generation of offspring of a hybrid. Symbol: F (no period). F1 is the first filial generation, F2, the second filial generation, and so on.
╂B>< Late Latin fīliālis < Latin fīlius son, and fīlia daughter]
–fil´i|al|ly, adverb.
–fil´i|al|ness, noun.
Useful english dictionary. 2012.