In a manner shaped like a club, with a thicker end tapering to a thinner base, especially as seen in botany or biology.
From Latin 'clava' (club) + '-ate' (having the quality of) + '-ly' (manner adverb). The root 'clava' comes from Proto-Indo-European and entered English through scientific nomenclature in the 18th century.
This word appears mostly in biology textbooks describing things like club-shaped antennae or fungal spores—scientists needed precise language to describe nature's varied shapes, and 'clavately' lets you describe that baseball-bat-like form in one specific word.
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