12-letter words containing r, a, d, i, o, t
- turacoverdin — a green pigment found in certain feathers of the touraco
- twin paradox — a phenomenon predicted by relativity. One of a pair of identical twins is supposed to live normally in an inertial system whilst the other is accelerated to a high speed in a spaceship, travels for a long time, and finally returns to rest beside his twin. The travelled twin will be found to be younger than his brother
- typhoid mary — Mary ("Typhoid Mary") 1869?–1938, U.S. cook, born in Ireland: known immune carrier of typhoid fever who infected many with the disease, institutionalized in 1914.
- unauthorized — lacking permission; unsanctioned: unauthorized access.
- undemocratic — pertaining to or of the nature of democracy or a democracy.
- undercoating — a coat or jacket worn under another.
- undiscordant — not discordant; not disagreeing or disagreeable
- unoriginated — not originated
- unpatronized — having few or no patrons
- vasodilatory — of or relating to the dilation of blood vessels
- ventromedial — relating to both the ventral and medial surfaces, or to the front and to the middle
- victoria day — (in Canada) the first Monday preceding May 25, observed as a national holiday.
- video rental — the system of renting films on video or DVD for a period of time in exchange for payment
- wild apricot — apricot (def 4).
- xanthochroid — of, relating to, or designating races having light-coloured hair and a pale complexion