multirope winding - noise reduction
- needle mineral
- needle plug
- needle zeolite
- needle-like
- needle-like habit
- needle-like habitus
- needlestone
- neft-gil
- neftgil
- nefud
- negative
- negative anomaly
- negative confining beds
- negative element
- negative gravity anomaly
- negative mineral
- negative moveout
- negative polarity pulse
- negative unit rhombohedron
- negative-valued contour