- Helispherical line
- Helispheric Hel`i*spher"ic, Helispherical Hel`i*spher"ic*al,
a. [Helix + spheric, spherical.]
Spiral.
[1913 Webster]
{Helispherical line} (Math.). the rhomb line in navigation. [R.] [1913 Webster]
The Collaborative International Dictionary of English. 2000.