In a manner characterized by slow or retarded growth.
From 'bradyauxetic' (adjective) plus the adverbial suffix '-ly'; converts the adjective into an adverb describing how something grows.
Bradyauxetically is one of those adverbs almost nobody uses in conversation—it exists primarily in scientific papers about developmental biology and paleontology, where researchers might describe how a fossil organism 'bradyauxetically enlarged its shell over geological time.'
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