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Rhachis 1

Definition: The spine.

Rhachis 2

Definition: The continued stem or midrib of a pinnately compound leaf, as in a rose leaf or a fern.

Rhachis 3

Definition: The principal axis in a raceme, spike, panicle, or corymb.

Rhachis 4

Definition: The shaft of a feather. The rhachis of the after-shaft, or plumule, is called the hyporhachis.

Rhachis 5

Definition: The central cord in the stem of a crinoid.

Rhachis 6

Definition: The median part of the radula of a mollusk.

Rhachis 7

Definition: A central cord of the ovary of nematodes.

 

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