English Words: U
23,789 words · Page 11 of 476
A Mexican and Central American tree (Castilla elastica), related to the breadfruit tree, whose milky juice contains caoutchouc.
Any of several cutaneous conditions involving redness and scarring, including atrophoderma vermiculatum and keratosis pilaris atrophicans faciei.
A white mineral with triclinic crystals, NaCaB₅O₉·8H₂O, noted for its fibers which transmit light by internal reflection, such that a piece with flat faces perpendicular to the fibers' orientation displays an image of whatever is adjacent to its other side.
A village and civil parish in Stroud district, Gloucestershire, England (OS grid ref ST7998).
Acronym of ultra low emission zone, an area in central London subject to stringent exhaust emission standards for motor vehicles; it was extended in 2023 to include all of Greater London.
A glycoprotein, either derived from urine or produced synthetically, that acts as a trypsin inhibitor and can be used to treat various medical conditions.
A selective progesterone receptor modulator used in the acetate form for emergency contraception and to treat uterine fibroids.
An atoll in the Caroline Islands of the western Pacific Ocean, about 191 km (103 nmi) east of Yap.
Synonym of the Helmsdale: a river in Highland council area, which flows into the North Sea at Helmsdale.
The copper-promoted conversion of aryl halides to aryl ethers, aryl thioethers, aryl nitriles, and aryl amines. These reactions are examples of cross-coupling reactions.[1]
Of or relating to the family Ulmaceae of flowering plants, including the elm and zelkova.
Of or relating to Gregory Ulmer (born 1944), writer and professor of English involved in cybermedia.
Spelling & Dictionary Insight
The English alphabetical index for the letter U contains 23,789 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 476 pages, and you are currently viewing page 11. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "U" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.