English Words: R
21,470 words · Page 342 of 430
The IEC prefix meaning 2⁹⁰ = 1,024⁹ = 1,237,940,039,285,380,274,899,124,224. Compare ronna-, meaning 10²⁷ = 1,000⁹ = 1,000,000,000,000,000,000,000,000,000, an octillion.
Strictly, 2⁹⁰ (1024⁹, 1,237,940,039,285,380,274,899,124,224) bytes or 2¹⁰ (1024) yobibytes, as opposed to a ronnabyte.
Any of various passerine birds (about 100 species) of the families Muscicapidae, Turdidae and Petroicidae (formerly Eopsaltriidae), typically with a red breast.
A type of boundary condition that specifies a linear combination of the value of a function and the value of its derivative at the boundary of a given domain.
A legendary English outlaw famous for his skill in archery and his vow to defend the poor and the oppressed against established authority.
The redistribution of economic resources due to which the economically disadvantaged gain at the expense of the economically advantaged.
A scheme for resolving hash collisions that favors the displacement of the element that is farthest from its home location.
A village and bay in Fylingdales parish, North Yorkshire, England, previously in Scarborough district (OS grid ref NZ9505).
Rule by British statesman Robert Walpole (1676–1745), especially between 1721 and 1742 when he is regarded as the Prime Minister of Great Britain.
A rare genetic disorder characterized by short-limbed dwarfism, abnormalities in the head, face, and external genitalia, and vertebral segmentation.
A finitely axiomatized fragment of first-order Peano arithmetic, lacking the axiom schema of mathematical induction.
A map projection that is neither equal-area nor conformal, designed as a compromise to show the entire world as a flat image.
A bijective correspondence between permutations and pairs of standard Young tableaux of the same shape. It has applications in combinatorics and other areas.
A genre of adventure fiction where a hero is stranded alone on a desert island and has to survive with their own wits.
Suggestive of the fictional Robinson Crusoe, a resourceful castaway on a desert island.
Suggestive of the fictional Robinson Crusoe, a resourceful castaway on a desert island.
A monoclinic-prismatic bluish lead gray mineral containing antimony, lead, and sulfur.
Spelling & Dictionary Insight
The English alphabetical index for the letter R contains 21,470 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 430 pages, and you are currently viewing page 342. 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 "R" 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.