English Words: O
15,494 words · Page 34 of 310
An analog of lactic acid, derived from the amino acids arginine and alanine, first isolated from the muscle tissue of octopus species.
A cephalopod of the superorder Octopodiformes, comprising octopuses and vampire squid.
An area of Jervis Bay, New South Wales, Australia, where gloomy octopuses (Octopus tetricus) are known to congregate. A colony of octopi and their constructed dens built out of scallop shells.
Any of several marine molluscs of the order Octopoda, having no internal or external protective shell or bone (unlike the nautilus, squid and cuttlefish) and eight arms each covered with suckers.
A contactless smart card, introduced in 1997, used as a form of payment in Hong Kong, originally for the mass transit system, but now widely used for public transport and other retail transactions.
A fungus of the genus Clathrus, especially C. archeri, featuring pink or white 'arms' and an odor similar to rotten meat.
Resembling or characteristic of an octopus, for example in having eight (or many) arms.
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 34. 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.