possibly extinct

American  

[pos-uh-blee ik-stingkt] / ˈpɒs ə bli ɪkˈstɪŋkt /

adjective

Biology, Ecology.

1. (as categorized by theIUCN Red List ) critically endangered to such an extent that evidence of its existence is profoundly limited and extremely difficult to verify: PE

   We can hope to find survivors among a possibly extinct species, but sadly we know how unlikely that is.

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Etymology

Origin of possibly extinct

First recorded in 2005–10

Example Sentences

Scientists have confirmed the rediscovery of Moema claudiae, a rare seasonal killifish species in Bolivia that had been considered possibly extinct.

From Science Daily

Waesche, meanwhile, though dormant and possibly extinct, may offer an answer to the most pressing question in Antarctic volcanology: With ice melting ever more quickly, will the volcanoes grow more active?

From Science Magazine

“We were ignoring vast amounts of DNA from unknown or possibly extinct organisms.”

From Science Magazine

Two years later, Mr. Thayer mounted an elephant as part of an expedition to seek a possibly extinct Southeast Asian bovine called a kouprey.

From Washington Post

Add in the number of possibly extinct species and the tally comes to 573.

From Reuters