navoj
1. spirala, koder, zvitek, zavoj, navoj
a round shape formed by a series of concentric circles (as formed by leaves or flower petals) [krogla oblika, oblikovana iz serije koncentričnih krogov (kot so oblikovani listi ali cvetni listi)]
2. navoj
the raised helical rib going around a screw [dvignjeni helikalni rebro, ki teče okoli vijaka]