English Words: R
21,470 words · Page 401 of 430
Of or pertaining to the large and diverse family of flowering plants known as Rubiaceae.
A small river in northeastern Italy which flowed into the Adriatic Sea marking the boundary between the Roman province of Gaul and the Roman heartland. Its crossing by Julius Caesar in 49 B.C.E. began a civil war.
The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87.
A butterfly, hybrid between the viceroy (Limenitis archippus) and the red-spotted purple (Limenitis arthemis astyanax).
A mechanical puzzle in the shape of a cube, all sides able to be rotated, each side divided into 9 squares, the moving pieces allowing the cube to be rearranged. The goal is to get the colored squares aligned so that each side of the cube is the same color.
The economic policies of US President Bill Clinton, emphasizing the effect that balancing the government budget has on long term interest rates.
A condition characterized by short stature, learning difficulties, distinctive facial features, and broad thumbs and first toes.
One of the red dye products extracted from madder root, probably identical with ruberythrinic acid.
An enzyme (ribulose-1,5-bisphosphate carboxylase oxygenase) which catalyzes both the fixing of atmospheric carbon dioxide during photosynthesis (and for a few chemioautotrophic bacteria) and the reverse process of photorespiration.
Any of a group of opioid peptides formed during digestion of the rubisco protein from spinach leaves.
The monetary unit of Russia, Belarus and Transnistria, equal to 100 kopeks. (Russian: копе́йка (kopéjka), Belarusian: капе́йка (kapjéjka)).
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 401. 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.