Answer: rachial

AnswerCrossword Clue
rachialthe part of the shaft of a feather bearing the web
rachialpertaining to a rachis (the spinal column, also RHACHIS)
rachiala. 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