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View definitions for rachis

rachis

noun as in spinal column

noun as in spindle

noun as in spine

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“The thickness of the rachis in some specimens is 3 microns thick. That’s less than the size of the average cell,” O’Connor says.

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It had a magenta rachis down the center with soft green vanes that shimmered yellow and purple and blue depending on how you turned it.

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But this specimen lacked the rachis; it just had barbs and barbules down its ribbonlike tail.

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Their structure suggests that the two finest tiers of branching in modern feathers, known as barbs and barbules, arose before the rachis formed.

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Fruit.—Fleshy, coalescent and sunk in the rachis.

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From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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