acumination
Example Sentences
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The leaf-like form results from an acumination and elongation of the wings, which in turn results from a marked elongation of the rim of the fore-wing.
From At the Deathbed of Darwinism A Series of Papers by Edwin V. O'Harra
The elaters are never fusiform, the apices always abrupt in their acumination, and the sculpture irregular and uneven.
From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by Thomas H. (Thomas Huston) MacBride
Therefore, I conclude, that C. chelonophilus, and still more C. Olfersii, are only varieties; the terga presenting the greatest, yet variable, amount of difference, namely, in their acumination and flatness.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
The degree of acumination of the basal portion of the tergum also varies; the internal surface sometimes has small crests radiating from the umbo.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
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