Quote:
Originally Posted by Lizardmen3477
what is f1 and f2s?
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It is an abbreviation for filial. It is a way to describe generations.
Dictionary.com Unabridged (v 1.0.1) - Cite This Source
fil‧i‧al /ˈfɪliəl/ Pronunciation Key - Show Spelled Pronunciation[fil-ee-uhl] Pronunciation Key - Show IPA Pronunciation
–adjective 1. of, pertaining to, or befitting a son or daughter: filial obedience.
2. noting or having the relation of a child to a parent.
3. Genetics. pertaining to the sequence of generations following the parental generation, each generation being designated by an F followed by a subscript number indicating its place in the sequence.