17-letter words containing a, c, i, f, o, r
- work-life balance — a situation in which one divides or balances one's time between work and activities outside of work: It's hard to achieve a reasonable work-life balance when you run your own business.
- x-ray diffraction — diffraction of x-rays by the regularly spaced atoms of a crystal, useful for determining the arrangement of the atoms.
- year of confusion — (in ancient Rome) the year of 445 days preceding the introduction, in 46 b.c., of the Julian calendar: lengthened to compensate for the cumulative errors of the Roman calendar.