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has been spawning

  • present perfect progressive
    of spawn (3rd person singular).
    spawn
    noun
    the mass of eggs deposited by fishes, amphibians, mollusks, crustaceans, etc.

Example Sentences

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Omicron has been spawning subvariants for months, and some researchers say that what matters now is how well a new booster formulation would protect against the latest subvariants, BA.4 and BA.5, not Omicron itself.

From New York Times ● Jun. 9, 2022

But omicron has been spawning subvariants for months, and some vaccine experts say what matters now is how well a new booster formulation would protect against the latest subvariants, BA.4 and BA.5, not omicron itself.

From Seattle Times ● Jun. 8, 2022

The game just came out on Friday and has been spawning memes ever since.

From Slate

A salmon that has been spawning; a foul fish.

From The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. by Sir Edward Belcher