RACHIS
- a. the axis of an inflorescence when somewhat elongated, as in a raceme b. (in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed c. any of various axial structures
- the part of the shaft of a feather bearing the web
- an axial structure as
- extension of the petiole of a compound leaf that bears the leaflets
- the spinal column [n RACHIDES, RACHISES] : RACHIAL [adj]
- the spinal column, also RHACHIS [n RACHISES or RACHIDES]