17-letter words containing a, b, o, r, t, i
- water-tube boiler — a boiler for generating steam by passing water in tubes (water tubes) through flames and hot gases.
- wheatstone bridge — a circuit for measuring an unknown resistance by comparing it with known resistances.
- working substance — a substance, usually a fluid, that undergoes changes in pressure, temperature, volume, or form as part of a process for accomplishing work.
- zebra swallowtail — a swallowtail butterfly, Papilio marcellus, having black and greenish-white stripes on the wings.