16-letter words containing a, d, i, p, o
- trapezoidal rule — a numerical method for evaluating the area between a curve and an axis by approximating the area with the areas of trapezoids.
- tridarn cupboard — a Welsh cupboard of the late 17th and 18th centuries, with an open, canopied upper section for display.
- two-tailed pasha — a distinctive vanessid butterfly of S Europe, Charaxes jasius, having mottled brown wings with a yellow-orange margin and frilled hind edges
- typhoid bacillus — the bacterium Salmonella typhosa, causing typhoid fever.
- unimproved value — the valuation of land for rating purposes, disregarding the value of buildings or other development
- upside-down cake — a cake that is baked on a layer of fruit, then turned before serving so that the fruit is on top.
- videodisc player — an electronic device for playing videodiscs through a television set.
- white propaganda — propaganda that comes from the source it claims to come from
- windfall profits — Windfall profits are excessive profits with a non-business cause such as a natural disaster.
- windowpane shell — capiz.
- wisconsin rapids — a city in central Wisconsin.