noun, plural rha·chis·es, rhach·i·des [rak-i-deez, rey-ki-] /ˈræk ɪˌdiz, ˈreɪ kɪ-/.
Definition for rhachis (2 of 2)
noun, plural ra·chis·es, rach·i·des [rak-i-deez, rey-ki-] /ˈræk ɪˌdiz, ˈreɪ kɪ-/.
- 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.
Origin of rachis
Examples from the Web for 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.