English Words: R
21,470 words · Page 11 of 430
A discrete probability distribution where a random variate has a 50% chance of being +1 and a 50% chance of being -1.
The Japanese technique of inserting a board-like material, a cut-out part of the mother-of-pearl inside the shell, into the carved surface of lacquer or wood.
A tetragonal rose-brown mineral containing chlorine, lead, sulfur, and tellurium.
One of a group of early medieval Jewish merchants forming a vast trade network across Europe, North Africa, the Middle East, and eastwards to China.
The main artery of the lateral aspect of the forearm that is one of the two branches of the brachial artery and enters the wrist on the side of the thumb.
A form of symmetry in which identical parts are arranged in a circular fashion around a central axis.
In the International System of Units, the derived unit of plane angle: the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle.
A spherical region of radius λ/2π around a small dipole electromagnetic antenna. This is the distance at which the induction and radiation terms are equal in magnitude. Inside, the induction terms dominate. In radio antenna theory the radiansphere is a convenient definition for the boundary between near-field and far-field regions.
A region of high-energy charged particles which partly surrounds a planet or star, trapped by its magnetic field and characterized by intense radiation.
A device whose readings, when coordinated from several sites, can be used to determine the exact position of an atomic blast.
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 11. 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.