It must explain all the facts which constitute what is known as atavism.
I used the word 'atavism' to mean a reversion to the primitive.
An atavism from "the old border riders" of Scotland shone through the boy, and he took on quickly.
Can I explain, can anyone explain, the mysterious vagaries of atavism?
Bohr was an atavism—they caught him trying to 'take over' there, and banished him.
Altogether a good deal of nonsense has been written about atavism.
These he "threw back" to his grandfather—not a fortunate illustration of the biological principle of atavism.
I would not omit to mention also the law of atavism, in this discussion of heredity.
Less marked cases set down to atavism may be instances merely of normal regression.
For a short moment he hesitated but atavism and necessity were against him.
1833, from French atavisme, attested by 1820s, from Latin atavus "ancestor, forefather," from at- perhaps here meaning "beyond" + avus "grandfather," from PIE *awo- "adult male relative other than the father" (see uncle).
atavism at·a·vism (āt'ə-vĭz'əm)
The appearance of characteristics that are presumed to have been present in some remote ancestor; reversion to an earlier biological type.