decagonally en · ADV
Etymology
From decagonal + -ly.
Meanings
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(not-comparable) In a decagonal manner.
Style upright, short, round, forming with the stigma a continuous clavate shaft equal to the limb; stigma decagonally fluted with shallow membranous ridges and alternately wider grooves[…]
1816, The Botanical Register, volume 2, page 119: