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Use "atavistically" in a sentence
"But, if I am beginning to be reconciled to their presence, Mother's state can only be described as atavistically maternal."
"The idea of grievance seems to define them in some eternal way and link them atavistically to a community of loved ones."
"The 4-winged homeotic mutants have changed the Hox mutation so that they atavistically recover the ancestral 4-winged insect condition, and never develop halteres."