English Words: O
15,494 words · Page 77 of 310
Any enzyme that catalyses the hydrolysis (cleavage) of a short oligopeptide rather than a protein
Any of a family of linear aromatic hydrocarbons having a structure of several benzene rings joined by single bonds
A member of an oligopoly; one of a small number of sellers with undue influence over a market.
An economic condition in which a small number of sellers exert control over the market of a commodity.
A polymer which occurs naturally in crude oil, or in one of its basic refractory components, usually a mixture of 2 or more polymers.
Describing a stem cell that is able to form two or more mature cell types within a tissue.
The capacity of a stem cell to differentiate into a limited number of cell types within a specific lineage, as distinct from other types of stem cells like pluripotent or multipotent cells.
An economic condition in which a small number of buyers exert control over the market price of a commodity.
Any of a group of compounds based on a short string of pyrrole rings joined together
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 77. 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.