- the axis of an inflorescence when somewhat elongated, as in a raceme.
- (in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed.
- any of various axial structures.
- Ornithology. the part of the shaft of a feather bearing the web.
- Anatomy. spinal column.
Origin of rachis
Examples from the Web for rhachis
Historical Examples of rhachis
The lower valve of the calyx turned to the rhachis is more than twice as small as the upper.
Rhachis hairy at the base of the flowers, ending in a naked pedicel.
Spikelets 3–12-flowered, somewhat terete, the rhachis with bearded joints; terminal flower abortive.
- a variant spelling of rachis
- botany the main axis or stem of an inflorescence or compound leaf
- ornithol the shaft of a feather, esp the part that carries the barbs
- another name for spinal column
Word Origin for rachis
- spinal column
- A main axis or shaft, such as the main stem of an inflorescence, the stalk of a pinnately compound leaf, the shaft of a feather, or the spinal column.