atavism /atˈə-vi-zm/

1. The reappearance of ancestral, but not parental, characteristics
2. Reversion to an ancestral, or to a primitive, type

• truncal
• truncate
• truncated
• truncately
• truncates
• truncating
• truncation
• truncation error
• truncation errors
• truncations
• truncheon
• truncheoned
• truncheoner
• truncheoners
• truncheoning
• truncheons
• trundle
• trundle bed
• trundle beds
• trundled
• trundler
• trundlers
• trundles
• trundle-tail
• trundle-tails