English Words: O
15,494 words · Page 168 of 310
Correctness of doctrine and belief in regard to any doctrinal (i.e. philosophical or theological) system.
Of or relating to a means of navigation by following an arc of the great circle corresponding to the shortest distance between two points on the globe.
Navigation based on calculating the shortest distance between two locations on a globe or sphere.
In an orthoepical manner: pronounced correctly or in accordance with standard usage.
An expert at orthoepy: a person who studies the pronunciation of words, especially (historical) one of the orthoepists, 16th- and 17th-century linguists who tried to establish standard English pronunciations and spellings.
An orthorhombic-dipyramidal reddish black mineral containing barium, hydrogen, iron, manganese, oxygen, and silicon.
Any compound, of general formula R-C(OR^')₃, having three alkoxy groups on a single carbon atom
Describing surgery to the bones of the face augmented by plastic surgery to the overlying tissue
Any of a class of chemical compounds with the general formula RFeO₃, where R is any rare earth element.
A linear geosynclinal belt lying between continental and oceanic cratons, and having internal volcanic belts (eugeosynclinal) and external nonvolcanic belts (miogeosynclinal). Also known as geosynclinal couple; primary geosyncline.
For given n and field F (especially where F is the real numbers), the group of n × n orthogonal matrices with elements in F, where the group operation is matrix multiplication.
Spelling & Dictionary Insight
The English alphabetical index for the letter O contains 15,494 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 310 pages, and you are currently viewing page 168. 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 "O" 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.