20-letter words containing x, i, a, n
- physical examination — an examination, usually by a physician, of a person's body in order to determine his or her state of health or physical fitness, as for military service or participation in a sport.
- population explosion — the rapid increase in numbers of a particular species, especially in the world's human population since the end of World War II, attributed to an accelerating birthrate, a decrease in infant mortality, and an increase in life expectancy.
- potassium binoxalate — a white, crystalline, hygroscopic, poisonous solid, KHC 2 O 4 , that is usually hydrated: used chiefly for removing ink stains, cleaning metal and wood, and in photography.
- réseaux ip européens — (RIPE) A collaboration between European networks which use the TCP/IP protocol suite to provide Internet services.
- saxe-weimar-eisenach — a former grand duchy in Thuringia in central Germany.
- sex change operation — a surgical operation designed to change a person's physical sexual characteristics to those of the opposite sex
- tax-deferred annuity — an annuity that enables one to purchase an insurance product that will earn interest, with the tax obligation deferred until withdrawals begin, usually at retirement. Abbreviation: TDA.
- toxemia of pregnancy — an abnormal condition of pregnancy characterized by hypertension, fluid retention, edema, and the presence of protein in the urine.
- trailing vortex drag — drag arising from vortices that occur behind a body moving through a gas or liquid
- uranium hexafluoride — a colorless, water-insoluble, crystalline, volatile solid, UF 6 , used in its gaseous state in separating uranium 235 from uranium.