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racemose
racer
racerunner
racetrack
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Rachel
rachilla
rachiotomy
rachis
rachitis
Rachmanism
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rachis

ra·chis [ ráykiss ] (plural ra·chis·es or rach·i·des [ ráki dz, ráyki dz ])


noun 
Definition:
 
1. botany plant stem: the main stem of a flower cluster or a compound leaf

2. birds feather shaft: the main shaft of a feather

3. anatomy spine: the spine of a vertebrate animal ( technical )

[Late 18th century. Via modern Latin< Greek rhakhis "spine, ridge"]

ra·chi·al adjective
ra·chid·i·al [ rə kíddee əl ] adjective
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