spondyl

Noun

Middle English spondyle, from Middle French, from Latin spondylus, from Greek sphondylos, spondylos vertebra, whorl of a spindle, muscle of a bivalve, a kind of mussel; akin to Greek sphendonē sling, sphadazein to jerk, be restless, Sanskrit spandate he quivers, Middle High German spat spavin

Combining form

Greek spondylos spondyl, whorl