19-letter words containing p, h, o, n, r, e
- write-protect notch — a cut-out on a floppy disk that determines whether a disk is writable
- zenithal projection — a type of map projection in which part of the earth's surface is projected onto a plane tangential to it, either at one of the poles (polar zenithal), at the equator (equatorial zenithal), or between (oblique zenithal)