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1) forming or arranged in a spiral
2) having the form of a flat coil or flattened spiral
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hel·i·coid (helґĭ-koid) [helico- + -oid] resembling a coil or helix; cf. spiroid.Medical dictionary. 2011.
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hel·i·coid (helґĭ-koid) [helico- + -oid] resembling a coil or helix; cf. spiroid.Medical dictionary. 2011.