17-letter words containing o, s, e, l, t
- visible radiation — electromagnetic radiation that causes the sensation of sight; light. It has wavelengths between about 380 and 780 nanometres
- visitors' gallery — a balcony in a building such as a parliament or court where members of the public can sit
- wang laboratories — (body) Computer manufacturer, known for their office automation products and the Wang PC. Quarterly sales $208M, profits $3M (Aug 1994).
- well-demonstrated — to make evident or establish by arguments or reasoning; prove: to demonstrate a philosophical principle.
- welsh nationalism — the political belief that Wales should be independent
- welsh nationalist — a person who believes that Wales should be independent
- welshman's button — an angler's name for a species of caddis fly, Sericostoma personatum
- wet one's whistle — to make a clear musical sound, a series of such sounds, or a high-pitched, warbling sound by the forcible expulsion of the breath through a small opening formed by contracting the lips, or through the teeth, with the aid of the tongue.
- whistler's mother — (formal name, Arrangement in Gray and Black No. 1: Portrait of the Artist's Mother) a painting (1871) by James McNeill Whistler.
- white blood cells — any of various nearly colorless cells of the immune system that circulate mainly in the blood and lymph and participate in reactions to invading microorganisms or foreign particles, comprising the B cells, T cells, macrophages, monocytes, and granulocytes.
- white-nationalism — white supremacy.
- wild sweet potato — man-of-the-earth.
- wireless operator — a radio operator
- worth one's while — a period or interval of time: to wait a long while; He arrived a short while ago.
- yellowstone falls — a waterfall in NW Wyoming, in Yellowstone National Park on the Yellowstone River
- yellowstone river — river flowing from NW Wyo. through Mont. into the Missouri River: 671 mi (1,080 km)
- zebra swallowtail — a swallowtail butterfly, Papilio marcellus, having black and greenish-white stripes on the wings.
- zola technologies — (company) Producers of the Z simulation language.