rachis
Central feather axis
Rachis is a technical term in biology for the main axis or stem from which smaller parts branch off.
In botany, it refers to the central stalk of a compound leaf or flower cluster, the part that smaller leaflets attach to.
In ornithology, it's the shaft of a feather—the stiff central structure that the barbs extend from.
The plural may be rachises or rachides.
A leaf's supporting stem
- inflorescencePlant's complete bloom arrangement
- peduncleFlower-bearing stalk
- internodeStem section between nodes
- midribCentral vein of foliage
pinnae · frond · compound · leaf · fern · palm · panicle · spikelet
Feather used for writing
- barbsSharp points or jibes
- vaneWind direction indicator
- calamusAromatic rhizome or reed
- shaftNarrow vertical passage
plumage · contour · down · coverts · afterfeather · hooklets · keratin · molting
petiole
A leaf's supporting stem
- inflorescencePlant's complete bloom arrangement
- peduncleFlower-bearing stalk
- internodeStem section between nodes
midrib · pinnae · frond · compound · leaf · fern · palm · panicle · spikelet · floret
quill
Feather used for writing
shaft · plumage · contour · down · coverts · afterfeather · hooklets · keratin · molting · preening
vertebrae
Interlocking bones of spine
discs · cervical · thoracic · lumbar · sacral · coccyx · cord · meninges · scoliosis · kyphosis
tail
Rear animal appendage
- feathersfeather, feathers, plume, down feathers, quill
- plant partsleaf, stem, root, leaves, flower
- bird anatomybeak, feathers, wings, tail feathers, wing feathers
- leaf partsblade, petiole, midrib, lamina, margin
- palm oilpalm oil, oil palm, palm fruit, palm kernel, oil palms
- palm leavesfrond, fan palm, date palm, coconut palm, pinnate