English Words: R
21,470 words · Page 70 of 430
a hardstyle subgenre which features a distinctly harsh, simplistic, raw, and dark sound, with fast bpm.
A human monoclonal antibody intended for the prophylaxis and treatment of inhaled anthrax.
A path that a photon or a group of photons takes through space, visible as a column of light.
Ellipsis of Hari Raya Aidilfitri, Eid al-Fitr, the Muslim festival that marks the end of the Ramadan fast.
Either of the two species of ovenbirds in the genus Aphrastura, native to southern South America.
A colourless triclinic mineral containing lead, hydrogen, oxygen, zinc, silicon, and sulphur.
A unit of brightness (of the sky at night) equal to 10¹⁰/4π quanta per square meter per second per steradian
A formula used in the min-max theorem to find exact eigenvalues, and in eigenvalue algorithms to obtain an eigenvalue approximation from an eigenvector approximation; it has applications in quantum mechanics.
The elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the light.
A type of natural convection, occurring in a planar horizontal layer of fluid heated from below, in which the fluid develops a regular pattern of convection cells known as Bénard cells.
An approximation to the spectral radiance of electromagnetic radiation as a function of wavelength from a black body at a given temperature through classical arguments.
An instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid.
A disorder caused by blockage of the long circumferential branches of the basilar artery, leading to ataxia, tremors, paralysis, etc.
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 70. 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.