H₄E₁L₁I₁C₃O₁I₁D₂S₁

15 points

HELICOIDS is validvalid

HELICOID, a type of geometrical surface [n]

101,412 of 196,601 in NWL2023·also valid in CSW24

HELICOID, a type of geometrical curve, a flattened spiral [n]

108,392 of 280,887 in CSW24·also valid in NWL2023