English Words: O
15,494 words · Page 162 of 310
A type of bipedal, herbivorous, bird-hipped dinosaur from the Cretaceous period, found on all seven continents.
A zoonotic infectious disease (of birds) caused by a bacterium called Chlamydia psittaci, it can be transmitted to humans and other animals. When carried by any species of bird belonging to the Psittacidae family (parrots), it is called psittacosis or parrot fever.
An integral equation that relates different correlation functions with each other and, together with a closure relation, is used to compute the structure factor and thermodynamic state functions of amorphous matter such as liquids or colloids.
An unincorporated community in the Mojave Desert, San Bernardino County, California, United States.
Belonging to the family Orobanchaceae, plants mostly parasitic on the roots of other plants.
A hybrid fruit developed by crossing a pomelo and a white grapefruit. When fully developed, it is approximately the size of a grapefruit.
A member of an ethnic group inhabiting the southern part of Khabarovsk Krai in Far Eastern Russia.
Relating to both the mouth and skin, as for example (a) a rash or lesion affecting both the oral mucosa and the perioral skin or (b) a fistula connecting the oral cavity to the skin of the cheek.
any of several rulers of Parthian Empire and kings of its nearby kingdoms including Elymais, Armenia, and Hatra
Of or pertaining to the mouth and the stomach; usually with reference to an enteral feeding tube passing through the mouth and into the stomach.
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 162. 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.