A variant or specific reference to organisms in the Actinomyces group; sometimes used interchangeably with actinomyces.
From actinomyces with a variant ending (-ese instead of -es), reflecting older nomenclatural conventions in microbiology.
This is the kind of word that shows how scientific naming can get messy—different scientists used slightly different endings, and some terms stuck while others faded away as standardization improved!
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