In a manner relating to or characteristic of an epizootic; describing how a parasitic disease spreads through animal populations.
From 'epizootic' plus the adverbial suffix '-ally'. This adverb form describes the manner or way epizootics occur.
When scientists say a parasite is spreading 'epizootically,' they mean it's moving through a population in ways that follow mathematical patterns—understanding these patterns lets them predict where the next outbreak will strike.
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