11-letter words that end in um
- tetrazolium — a derivative of an acidic chemical compound
- tidal datum — (in a hydrographic survey) a curved surface representing one phase of a tide, usually mean low water, taken as a datum level.
- tridominium — the shared rule of three states
- truth serum — a drug, as the barbiturate thiopental, that induces in the subject a desire to talk or a state of heightened suggestibility, used in psychotherapy and in interrogation to discover repressed or consciously withheld information.
- ultravacuum — an extremely high level of vacuum
- unnilennium — meitnerium.
- unnilhexium — seaborgium.
- unniloctium — hassium.
- ununpentium — a superheavy, synthetic, radioactive element with a short half-life. Symbol: Uup; atomic number: 115.
- ununquadium — a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Fl; atomic number: 114.
- ununseptium — a superheavy, synthetic, radioactive element with a short half-life. Symbol: Uus; atomic number: 117.
- van der hum — a spicy liqueur from South Africa, flavored with tangerine and herbs.
- xanthan gum — a water-soluble natural gum produced by the fermentation of sugar with certain microorganisms and used as a binder, extender, or stabilizer in foods and other products.
- xenodochium — a guesthouse for receiving strangers
- xeranthemum — any of a Mediterranean genus of plants having flower heads that are dry and retain their colour and shape for years: family Asteraceae (composites)
- zanthoxylum — any rutaceous shrub or tree of the genus Zanthoxylum, of temperate and subtropical E Asia and North America: includes the prickly ash and the West Indian yellowwood (or satinwood)
- zoogonidium — a motile plant or fungal structure containing spores
- zx spectrum — (computer) Sinclair's first personal computer with a colour display. The Spectrum used the Zilog Z80 processor like its predecessors the ZX-80 and ZX-81. It was originally available in 16k and 48k versions using cassette tape and later grew to 128k and sprouted floppy disks. It had a wider and more solid case and a marginally better "dead flesh" keyboard. Unlike the earlier models, it didn't require the presence of a cold carton of milk to prevent it overheating. It was possibly the most popular home computer in the UK for many years. The TK-90X was a clone.