English Words: U
23,789 words · Page 472 of 476
A system of ethics based on the premise that something's value may be measured by its usefulness.
A hypothetical collection of tiny nanobots that can replicate a physical structure. The robots would be microscopic, with extending arms reaching in several different directions, and could perform three-dimensional lattice reconfiguration.
The graph K_(3,3), which has six vertices in two sets of three and nine edges such that every vertex in one set is connected to each vertex in the other.
A tall cylinder, often made from the trunk of a tree, usually topped by a cross beam, used by a public utility to carry wire, cable or conduit through the air, for the transportation of electricity, cable television, telephone or similar services.
An asana that exercises the hamstrings, quadriceps, gluteal muscles, and erector spinae.
superlative form of utter: most utter; situated at the most distant limit; farthest, outermost.
A certain Native American language family including a large number of geographically distant languages such as Hopi, Nahuatl (Aztec) and Comanche.
A family of pitches that can all be expressed as ratios with a specified fixed tone, such that all ratios have the same numerator; a subharmonic series.
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 472. 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.