English Words: O
15,494 words · Page 179 of 310
Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds.
A chemical element (symbol Os) with atomic number 76: a hard, brittle, heavy, bluish-white transition metal found as a trace element in alloys, mostly in platinum ores.
A form of cryptobiosis triggered by increased solute concentration in the solution in which the organism lives.
To maintain its internal salinity such that it is always equal to the surrounding seawater
Any marine invertebrate that maintains its internal salinity such that it is always equal to the surrounding seawater
An apparatus, consisting of a number of cells whose sides are of parchment paper, for conducting the process of osmosis. It is used especially in sugar refining to remove potassium salts from the molasses.
An instrument for recording the height of the liquid in an endosmometer or for registering osmotic pressures.
The molality of an ideal solution that would exert the same osmotic pressure as the solution being considered.
The osmotic concentration of a solution, normally expressed as osmoles of solute per litre of solution.
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 179. 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.