Definition of lusus naturae in English:

lusus naturae

Pronunciation: /ˌlo͞osəs nəˈt(y)o͝orˌī//ˌlo͞osəs nəˈt(y)o͝orˌē/

noun

rare
  • A freak of nature.

    • ‘At length by mere accident I discovered an extraordinary lusus naturae in the disposition of the right subclavian artery.’
    • ‘More specifically, the Old Man represented a kind of curiosity called the lusus naturae, a play or joke of nature.’
    • ‘On Sunday last, a cow of the Durham breed calved, along with a remarkably fine bull calf, which is still alive, a very curious lusus naturae.’
    mutant, variant, variation, freak, freak of nature, deviant, monstrosity, monster, deformity
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Origin

Latin, literally a sport of nature.

Pronunciation:

lusus naturae

/ˌlo͞osəs nəˈt(y)o͝orˌī//ˌlo͞osəs nəˈt(y)o͝orˌē/