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Definition of: filial
(fil′ē·əl, fil′yəl) adjective
1. Of, pertaining to, or befitting a son or daughter; due to parents.
2. Genetics Pertaining to a generation following the parental. The first filial generation is designated F1, the second F2, etc. [<LL filialis <L filius a son]
—fil′i·al·ly adverb
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