Answer | Crossword Clue |
---|---|
envelope | curve tangent to each of a family of curves |
envelopes | A curve or surface tangent to each of a family of curves or surfaces |
envelope | surface tangent to each of a family of surfaces |
crunode | a point at which two branches of a curve intersect, each branch having a distinct tangent; node |
trajectories | A curve or surface cutting a family of curves or surfaces at a constant angle |
trajectory | A curve or surface cutting a family of curves or surfaces at a constant angle |