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Rachis :: Rachis (n.) Same as Rhachis.

Rhachis :: Rhachis (n.) The principal axis in a raceme, spike, panicle, or corymb..

Rhachis :: Rhachis (n.) A central cord of the ovary of nematodes.

Hyporhachis :: Hyporhachis (n.) The stem of an aftershaft or hypoptilum.

Rhachis :: Rhachis (n.) The shaft of a feather. The rhachis of the after-shaft, or plumule, is called the hyporhachis..

Rhachis :: Rhachis (n.) The median part of the radula of a mollusk.

Tripinnate :: Tripinnate (a.) Having bipinnate leaflets arranged on each side of a rhachis.

Rhachis :: Rhachis (n.) The continued stem or midrib of a pinnately compound leaf, as in a rose leaf or a fern..

Rhachidian :: Rhachidian (a.) Of or pertaining to the rhachis; as, the rhachidian teeth of a mollusk..

Rhachis :: Rhachis (n.) The spine.

Rhachis :: Rhachis (n.) The central cord in the stem of a crinoid.

Rhachises :: Rhachises (pl. ) of Rhachi.

Virgularian :: Virgularian (n.) Any one of numerous species of long, slender Alcyonaria belonging to Virgularia and allied genera of the family Virgularidae. These corals are allied to the sea-pens, but have a long rodlike rhachis inclosing a slender, round or square, calcareous axis. The polyps are arranged in transverse rows or clusters along each side of the rhachis..

Vane :: Vane (n.) The rhachis and web of a feather taken together.

Vexillum :: Vexillum (n.) The rhachis and web of a feather taken together; the vane.

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