Having a strong affinity for eosin dye; tending to stain readily with eosin, or rich in eosinophils.
From 'eosin' plus Greek 'philus' (loving), with the adjective suffix '-ous', creating a more formal variant of 'eosinophilic.'
While 'eosinophilic' and 'eosinophilous' mean essentially the same thing, scientists prefer 'eosinophilic' in modern medicine, making 'eosinophilous' sound refreshingly old-fashioned when you encounter it in historical texts.
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