12-letter words containing x, d, a
- sixth-grader — a pupil in their sixth US school year after kindergarten, who is usually around 11 or 12 years old
- sulphadoxine — an antibiotic drug of the sulphonamide group, commonly used in combination with pyrimethamine to treat malaria, and in combination with various drugs to treat certain infections
- tax-deferred — noting or providing income that is not taxed until a later time.
- taxi dancing — a system, as in a dance hall or hotel, whereby a person pays for a partner (taxi dancer) for a dance, payment being required for each individual dance during an evening
- tetrahydroxy — (of a molecule) containing four hydroxyl groups.
- 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
- unexpendable — essential; absolutely required: unexpendable resources vital to our security.
- unexpurgated — to amend by removing words, passages, etc., deemed offensive or objectionable: Most children read an expurgated version of Grimms' fairy tales.
- unextenuated — not extenuated
- unoxygenated — not enriched with oxygen
- uranic oxide — uranium dioxide.
- vax document — A document preparation system from DEC.
- wax and wane — moon: go through phases
- waxed cotton — cotton that is treated with wax to make it waterproof
- waxed jacket — a waterproof jacket made of waxed material
- windfall tax — a tax levied on an organization considered to have made excessive profits, esp a privatized utility company that has exploited a monopoly
- xanthene dye — any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C 6 H 4) groups are the chromophore.
- xanthic acid — an unstable organic acid, C 3 H 6 S 2 O, the methyl and ethyl esters of which are colorless, oily liquids with a penetrating odor.
- xanthochroid — of, relating to, or designating races having light-coloured hair and a pale complexion