English Words: R
21,470 words · Page 1 of 430
University of Reading, used especially following post-nominal letters indicating status as a graduate.
The theory that the character Jon Snow, initially presented in A Song of Ice and Fire/Game of Thrones as the bastard son of Ned Stark by an unknown woman, is actually a secret child born of the union of Rhaegar Targaryen and Lyanna Stark.
In the neo-Gricean semantics and pragmatics of Laurence R. Horn: a reformulation of Paul Grice's maxim of relation combined with the second submaxim of quantity and the third and fourth submaxims of manner, stating: "Say no more than you must (given Q)", and implying that there is no reason to make a stronger statement if the extra information can be contributed by implicature.
The relatively rapid nucleosynthesis process, in supernovae, in which a large neutron flux allows rapid neutron capture and synthesis of elements up to the transuranic elements.
Of a motion picture, having an "R rating" from one more motion picture rating authorities, typically meaning it is suitable only for adults.
A kind of tree data structure used to group objects by nearness of location, representing them by their minimum bounding rectangles in the next higher level of the tree.
A theory regarding the selection of combinations of traits in an organism that represent a trade-off between quantity and quality of offspring.
Initialism of rule out: used to indicate that a certain possible diagnosis should be considered, and appropriate tests performed to rule it out.
The Phalanx CIWS, an automated gun-based close-in weapon system to defend military watercraft against incoming threats such as aircraft, missiles, and small boats.
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 1. 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.