Helical
Helical antenna
Helical camshaft
Helical scan
Helical plc
Large Helical Device
Ampex 2-inch helical VTR
Helical wheel
Magnetic helicity
Helical armature
Helical orbit spectrometer
Herringbone gear
Helical railgun
Gorlov helical turbine
Arminka Helic
Helical growth
Helical resonator
Axial chirality
Obsolete models of DNA structure
Helical extrusion
Hydrodynamical helicity
Helicity
Helical engine
Adela Helić
Helical boundary conditions
Helically Symmetric Experiment
IVC videotape format
Screw piles
Helical Dirac fermion
Coil spring
Helical band actuator
Operation of computed tomography
Alpha helix
Symmetry (geometry)
Helicity (particle physics)
Stairs
Helicity basis
List of gear nomenclature
Helix
Nucleic acid double helix
Gear
Collagen helix
Boerdijk–Coxeter helix
Helix bundle
Screw axis
Vortex shedding
Threaded insert
Plasmodium helical interspersed subtelomeric protein
ARMH1
Progressing cavity pump
Bacterial cellular morphologies
Hikaru (singer)
Zoids: Chaotic Century
Apeirogon
Magazine (firearms)
Screw thread
VHS
Models of communication
List of twisted buildings
Helicoidal flow
Storm-relative helicity
Tauopathy
Bacilli
Heliacal rising