throwback has definitions from the field of biology
1
[ noun ] (biology) an organism that has the characteristics of a more primitive type of that organism

Synonyms

atavist

Related terms

life_form

2
[ adjective ] characteristic of an atavist

Synonyms

atavistic

Related terms

regressive

3
[ noun ] a reappearance of an earlier characteristic

Synonyms

reversion atavism

Related terms

recurrence

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