English Words: O
15,494 words · Page 163 of 310
A machine for use in making topographical maps, operated by being pushed across country, and recording distances and elevations.
A camera for obtaining a circular panoramic view of the horizon. The photographic plate is placed horizontally with a vertical lens above. A specially-shaped mirror reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.
An alloy of copper and zinc or tin that has a gold color, used in making inexpensive jewelry.
An aneroid barometer having a second scale that gives the approximate elevation above sea level of the place where the observation is made.
The largest and most populous region in Ethiopia, covering an area of approximately 353,006 square kilometers.
A river in West Asia, about 400 km (250 mi) long, flowing from Lebanon through Syria before entering the Mediterranean Sea near Samandağ in Turkey.
Any of a number of tropical birds related to the caciques, mostly in the genus Psarocolius, and, like the caciques, noted for living communally in large, hanging basket nests.
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 163. 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.