In a manner that is conoidical; in a cone-like way, especially in specialized mathematical or geometric contexts.
From conoidical + -ly (adverb suffix). This creates an adverb from the adjective conoidical, resulting in one of the longest and most technical words in this family.
At this point in the suffix stack—conoid → conoidical → conoidically—we've gone so deep into specialized jargon that almost no one uses this word except maybe one mathematician describing surface properties in a 1920s geometry textbook!
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